Around the World in Ten Days

"Did you say this big Air Derby around the world takes place this coming summer, Bob?"

"So dad told me at the breakfast table this morning, Paul. The plans have just been completed. He said full details would be in to-day's papers."

"And the afternoon edition is out now, for there's a newsie just ahead of us who is calling out the Daily Independent. That's your father's newspaper, too."

"It will be in there sure pop, Paul."

"Then I'm going to get a copy right now."

The two youths, who but a few moments before had come out of the broad doors of the Clark Polytechnic Institute along with a noisy throng of other students, paused when they reached the newsboy in question, and the taller of the pair bought a newspaper which he shoved into an inner pocket of his raincoat.

"We'll look at this in the car on our way home; a fellow can't do any reading in a storm like this," said the purchaser. "Let's hurry up a bit, Bob; I'm so eager to see what it says about that Derby that I can hardly wait to get to the station. Say, just think of it-a race around the world by air! Won't that be great?"

"I'll say so, Paul old boy! They ought to smash all existing records. You know that a man named Mears made the circuit in thirty-five days about seven years ago, and he had to depend on slow steam trains and steamships, aided by a naphtha-launch."

"That's true, Bob. Now that we have planes we ought to do a lot better. But the big oceans are the trouble for aircraft. The Atlantic has been crossed by Alcock and Brown in a Vimy-Vickers biplane, and also by our NC-4 flying-boat under the command of Lieutenant Read, and by the big English dirigible R-34; but the Pacific, with its greater breadth, has seemed so impossible that it has never been attempted."

"Why should it seem impossible?"

"Because they can't carry sufficient gasoline to cross the Pacific."

"But how about the islands?"

"The majority are not level enough to permit a landing, and others are too widely scattered. I have made quite a study of transoceanic flight since Harry Hawker and his partner, Grieve, made their unsuccessful attempt last spring to cross the Atlantic in a Sopwith machine, and for my part I can't see how this proposed Derby around the world can all be done by air, when no machine has ever yet been able to hop the Pacific."

"Well, Paul, we'll soon be at the station out of this storm, and then we can see what the paper says about it," was the philosophical conclusion of his companion.

With that they hurried on down the street, bowing their heads to ward off the sharp sleet as much as possible, while they gripped their school-books under their arms. They were a splendid-looking pair of young Americans, probably about eighteen years old, and the manner in which they swung along through the disagreeable drizzle, paying scant attention to it as they laughed and talked, showed them to be full of that boundless energy and gaiety of spirits which only perfect health and participation in athletics can bestow.

As Paul Ross and Robert Giddings approached the next corner, a young man with umbrella held low in front of him hurried around it and ran into a small Italian girl who was carrying a basket of fruit. She was staggered by the collision; her basket was knocked from her arm, and the oranges began to roll in every direction. The child broke into tears, but the cause of her misfortune only paused long enough to say angrily, "Confound you, you careless little beggar! Why don't you watch where you are going?" and hurried on his way.

"Say, Paul, did you see the way that swarthy-faced chap used that little girl?" cried Bob indignantly.

"I certainly did," was the no less indignant answer. "That lazy dog ought to be horse-whipped. Let's help the child."

Both boys fell to work with a will, rescued the escaping oranges, and tucked them back in their owner's basket. Then, with her grateful thanks ringing in their ears, they hurried on once more.

After they had gone a few steps, Paul Ross observed:

"Bob, I've seen that fellow before. That was Pete Deveaux. He used to be an Air Mail pilot on the same run as my brother John, but was discharged for drunkenness. Since that he has blamed John, and has written him several threatening letters, but is too cowardly to face him."

By this time they had reached the West 137th Street station of the suburban railroad which runs between the metropolis and various shore towns along the picturesque Hudson. They were just in time to catch a train, and found a comfortable seat in a rear coach. Then Paul brought forth the newspaper he had purchased. What they sought was found on the very first page, prominently displayed under a black-faced heading.

"Read it aloud, Paul," suggested Bob, and his friend proceeded to do so. The article was to the effect that the Aero Club of America, in conjunction with eminent aviation associations of the kind in Europe and Asia, had planned to stimulate interest in flying by holding an aircraft race around the world, which would start on the morning of July 4th. All contestants must be at least twenty-one years of age, and furnish an entrance fee of two hundred dollars. They might use any type of aircraft they chose, and could carry as many assistants as they wished, even utilizing trains or steamships, if not less than three-fourths of their journey were made by air; and they must stop at least once in each of four continents, and cross the Atlantic and Pacific oceans. Aside from these provisions, the selection of route was left entirely to each contestant. Then followed an imposing list of names of well-known flyers who, it was said, had signified their intention of competing. The article wound up with the statement that prizes aggregating a million dollars would be offered the winners.

"One million dollars!" exclaimed Bob Giddings. "Paul, old man, you'd better go in for this!"

Paul Ross's eyes sparkled, but the next moment he laughed and shook his head. "I surely would like to," said he, "but there are just three little things in the way of it."

"I suppose you need a machine for one thing?"

"Yes-and you must admit that's a good-sized item. Second, I need two hundred dollars to enter-something I don't happen to have, and something I know mother can't spare in such a hazard. Third, I need three years added to my age in order to be eligible."

"It does look rather hopeless for you, that's a fact," admitted Bob. "That second handicap might be overcome with my father's help, but the other two are real obstacles."

"It's mighty nice of you and your father, Bob, to wish to help me out in this fashion," said Paul; "but, as you state, the other drawbacks cannot be swept aside so easily. Perhaps later on, another 'round the world Air Derby will be pulled off, and I shall have a chance to enter it."

"Well, if you do, don't forget to count me in as an assistant," declared his friend. "Nothing would please me better than to make a trip like that with you, Paul."

"You certainly shall be welcome if the time ever comes. By the way, Bob, John and I have designed a new type of monoplane in our spare time, and for the past two months I have been busy making a three-foot model of this. I hope to finish it in a day or two, and I want you to go with me over to the old fair-grounds next Saturday afternoon and give it a test flight, if you will."

Bob Giddings was all interest at once, and plied his friend with many questions concerning his new model, many others of which he had in times past helped Paul fly with the keenest delight. The truth is, Paul Ross and his brother John, the latter a pilot in the government Air Mail service, were known all over the State of New York as makers of the best-flying model airplanes to be found anywhere. Ever since they were small boys in grammar school, the brothers had been constructing miniature monoplanes, biplanes, and seaplanes, which they had pitted against the best product of other lads in the neighborhood and surrounding towns, without once meeting defeat. Many of these specimens of youthful ingenuity they still preserved, suspended in bedroom and attic, where they were a never-ending source of interest to visitors at the Ross homestead in the outskirts of Yonkers.

The war had called John into the aviation service of his country, but Paul had still continued his experiments in making tiny airplanes, getting his friend Robert Giddings, who lived in a fine house on Shadynook Hill, to assist him in the flying. Thrown together by their mutual love for mechanics, and being in the same classes all through high-school, Paul and Bob had formed a strong attachment for each other, although the latter's home was far more pretentious than the former's, since Paul's mother was a widow in only moderately comfortable circumstances, while Bob's father was the editor and owner of the Daily Independent, one of the leading evening newspapers of New York City.

When John returned from the war it was with an incurable passion for flying, and within a few months he had re-entered the service of his country in the peaceful but dangerous work of carrying Uncle Sam's mails between Washington and New York in a big Martin bomber. He found that his younger brother's love for aviation had also developed, as well as his skill in constructing and flying model airplanes. Some of these recent ones were so novel in design and of such wonderfully ingenious workmanship, that John, who had won unusual honors as an aviator on the French front, was quite thunderstruck, and determined to encourage Paul's talents in this line in every way he could. Therefore, when the boy graduated from the Yonkers high school, and expressed a wish to take up a special course in aeronautical engineering at Clark Polytechnic Institute, John backed him up, and the mother, who would have preferred a less hazardous profession for her younger son, sighingly consented.

Paul's chum, Robert Giddings, had also gone to Clark Polytechnic upon leaving high school, his ambition being to become an electrical engineer. Thus both boys continued to be thrown in daily contact. It was their habit to go into the city to school each morning in the sedan with Mr. Giddings; but as he left the city late in the afternoon they usually took the train back.

As the friends now parted, Bob Giddings' last words were: "Don't forget to get that new model airplane done by Saturday, Paul. I'm crazy to see it."

"I'll be ready for you," was Paul's assurance; "but remember to keep this under your hat. It's to be a secret test, you know."

"Trust me," said Bob.

When Paul Ross reached home that afternoon, it was to find someone there whom he had not expected to see. A tall, broad-shouldered young man, with a bronzed face and pleasant blue eyes, sat in the living-room, talking to his mother.

Paul rushed forward and joyfully grasped his brown hand. "Why, John!" he exclaimed, "I didn't expect to find you here!"

"Of course you didn't, Buddy," was the smiling response of the young man, who was wont to call his younger brother by this affectionate war-mate term. "The fact is, as I was just telling mother, two days ago I didn't know myself that I would be anywhere at this hour except speeding through the air between New York and Washington on my usual mail run in my trusty old Martin-bird. As it is, Buddy, it looks now as if neither you nor I would ever handle her controls again." There was a note of sadness in John's voice as he said this.

"Why, what's the matter, John?" asked Paul quickly.

"It's this way, lad: You know I told you and mother a couple of weeks ago, when I was here on my last regular lay-over, that Congress was talking about cutting a big slice out of the Air Mail appropriation, in order to reduce expenses. Well, the upshot of it all is, they made the cut, and not having enough money to carry on the service as it has been, the head of the Air Mail has ordered the abandonment of all flying divisions except the main line between New York and San Francisco. Only those pilots will be kept. So that's why I am here."

"Won't they take you on again soon, John?" asked Mrs. Ross.

"I fear not, mother," replied her elder son, shaking his head soberly. "Our field-superintendent did say that he would give me the first opening in the transcontinental line, since my records lead the bunch, and he even offered to displace one of the boys on that route and put me in his place, but-"

"But you refused," interrupted Paul, with conclusive pride in his big brother.

John grinned. "Well, put it that way if you like, Buddy," said he; "anyhow, as I said before, here I am. Some chap may quit or 'go West'-you know a round dozen of the poor chaps have been killed in the last year-and that may let me back in again. But I won't wait for it; I'll get after some of the commercial flying companies next week and see if I can't land a berth with them. I simply can't think of working on the ground. I guess I should have been born a bird, mother, instead of a human being, I love flying so much."

"I really believe you would be safer if you were a bird, John," asserted Mrs. Ross, with an uneasy smile. "Birds have no motors to fail them, no fire to ignite and burn them up, as our present airplanes. How many of your own unfortunate associates can lay their untimely deaths to either one of these causes! It was only the last time you were here that you were telling Paul and me about the terrible fall Howard Smith had because his motor stopped, and how his machine ignited, and how he was burned past recognition."

"I know," said the veteran airman; "those things will happen at times, mother, even with the most careful fellows. The time will come, I think, and very soon, when stalled motors can be restarted in the air, and when accidentally ignited fuel will burn itself out with no harm to either the machine or its occupants. The fact is, Paul and I have some ideas now as to how to overcome those very troubles, along with other improvements, and the first chance we get we are going to build an airplane along these lines and put it to the test, aren't we, Buddy?"

"We surely are," was Paul's enthusiastic response. "One of these fine days, mother, when we get our patents and sell them, you shall live in as fine a home as the Giddings's over on Shadynook Hill, and when you wish to go into the city to do any shopping, John or I will take you in a beautiful sedan airplane which will be safer than an automobile, and which will be guaranteed not to raise a dust or wear out tires."

Mrs. Ross laughed heartily at the glowing picture her second son had drawn, more because he spoke with such seriousness, and because John too wore a matter-of-fact look during the prophecy.

"Oh, I have some great dreamers here in this little family," she said, as she arose to resume her household duties. "We will hope that some of your dreams come true."

Her sons laughed good-naturedly; then Paul turned to his brother. "Come on down in the basement, John," he said; "I wish to show you our latest miniature model, the Sky-Bird. Another day's work ought to finish it."

John followed him downstairs. In one corner of the large basement was a good-sized workbench, lighted by two windows, and equipped with several neatly-arranged shelves, which now held a divers collection of chisels, bits, countersinks, etc. In a splendid oak cabinet attached to the wall above was a more extensive array of wood- and metal-working tools, some of which the brothers had bought with money earned at odd jobs when they were still small boys. Since, they had added to their set from time to time, as they needed this tool or that, until now few professional mechanics could boast of a finer assortment.

Suspended from a hook directly over the bench was a beautiful six-foot model of a racy-looking monoplane of peculiar and striking design. It was glistening in several coats of spar-varnish, and so light and delicate was its spidery frame that, as John reached out to take it in his hand, the exhalation of his breath set it swaying away from him.

"My word, it's a light boy all right!" exclaimed John admiringly, as he carefully took hold of the pretty thing. "That's just the feature we've tried to get, too, Buddy,-lightness." He looked closely at the long, graceful pair of wings, which were of an unusual thickness and a slight upward thrust like those of a bird, and which widened batlike as they ran back and joined the rear fuselage or body of the craft. "Have you put the helium-gas in these wings yet, Paul, as we planned? I see you have installed the valves. There's a valve in the after-fuselage, too."

"The wings and fuselage are both filled," said Paul; "that is what makes the Sky-Bird so light. If you had brought more helium the last time you were here, I could have pumped in twice the quantity, I think, and that would have made her so light she would rise of her own accord, I really believe. As it is, she now weighs less than a half-ounce. I had the scales on her yesterday."

John shared his brother's enthusiasm. "Fine!" he cried, with sparkling eyes. "Why, that's almost a neutral condition, as she is! Buddy, if we can apply this principle to a full-size machine-and I don't know why we can't-we shall have solved the biggest problem facing airplane designers to-day. With a machine weighing only a trifle more than her load of fuel and baggage, she will not only fly a lot faster but go a lot farther, with a given supply of fuel, than the present-day planes. And what is more, she could attain good speed with a single engine of reasonable power, where now many machines are handicapped with the burdensome weight of an extra power-plant. When will she be ready to test out?"

"I had planned to give her a trial in the old fair-grounds Saturday afternoon," said Paul. "I've asked Bob Giddings to go along."

"That's all right; Bob is a fine lad," said John; "but since you have set the trial for Saturday afternoon, and Bob's father is usually at home at that time, why don't you ask him to view the affair also? I'm sure he would enjoy it. He's a great sportsman, you know, like most newspaper men, and considerably interested in aeronautics."

"I had not thought of it; I'll do it," was the prompt response of Paul. "But we must warn him to silence, John. Whatever happens, we don't wish this to get into the Daily Independent."

"I'd say not," rejoined the former Air Mail pilot sententiously. "Mum's the word; we've got something here, Buddy. Unless I'm greatly mistaken we'll be consulting with the Patent Office at Washington much sooner than little mother anticipates." He poked Paul in the ribs as he spoke, and both young men gave vent to a low chuckle of intense satisfaction. It was an even greater pleasure to look forward to surprising their mother than to astonishing the world and winning its plaudits.

As good an airplane mechanic and flyer as John Ross was, his younger brother was little behind him in the matter of skill in handling a modern machine. It had been John's habit to return to Yonkers every two weeks for a week's lay-off, as customary with other pilots in the Air Mail service. On these occasions he had arrived in his plane, and during the term of his stay had often taken Paul up into the air for pleasure flights, as well as his chum Bob Giddings. Both boys were keen students, and it was not long before John could trust them to operate his big Martin with every confidence. Once, indeed, he and Paul had been caught over Long Island Sound in a bad storm, when the latter was in the pilot's seat, but Paul had brought the craft through like a veteran, winning his brother's unstinted praise and undying respect.

Mr. Giddings was glad to accept the invitation to the trial flight. He and his son met the Ross boys at the old race-course Saturday afternoon. This immense, level field, with its one-mile oval and great empty sheds, at one time had been the county's boasted fair-grounds, but two years prior to the opening of our story it had been sold to Mr. Giddings, whose residence property stretched down the side of Shadynook Hill and joined it. New fair-grounds had then been established in another and more centrally located section of the district.

In the old grounds the boys of the neighborhood now went to fly their kites and model airplanes, to hold impromptu bicycle and foot races, and to play tag and hide-and-go-seek in the cavernous sheds and around the numerous sagging stables.

It was late in the afternoon-just before dusk, when the winds would be at their quietest, and others not likely to be present-that our friends arrived at the field. There was not a soul to be seen. Paul, who had carried his precious Sky-Bird, freed it from the wrapper and held it up for Mr. Giddings to see. The night before he and John had put the finishing touches to the delicate structure by adding another coat of varnish and attaching the little rubber-tired aluminum wheels to the axle.

As Paul now held it up before the gaze of the great newspaper man, Mr. Giddings made no effort to restrain his admiration. "What a little beauty!" he cried. "Why, it's almost a perfect mechanical representation of a bird!"

"Isn't she a dandy, dad?" put in Bob, his eyes snapping.

"The Sky-Bird is really more of a bird than you may think, Mr.

Giddings," declared Paul.

"Yes," added his brother John. "As you probably know, sir, a bird gets its great buoyancy from the fact that every bone in its body is hollow; in flight it fills these bones with a very light gas, which is formed by an action of its lungs in drawing in air. We have adapted this principle in the wings and fuselage of this little machine. They are airtight and filled with compressed helium-gas, which is non-inflammable and nearly as light as its highly volatile rival, hydrogen-gas."

"Hydrogen-gas is surely a dangerous commodity around fire," said Mr. Giddings. "I understand that when the big English dirigible R-34 came across the Atlantic last summer she was filled with hydrogen, and that her commander and crew all wore felt-soled shoes, so that they would not by any chance cause a spark when they walked over her metal floors and ladders just beneath her great bag."

"That is true," vouched John Ross. "One little spark reaching any of that stored hydrogen would have torn that great dirigible into fragments in one gigantic blast."

"We have handled recent newspaper copy containing mention of this new gas, helium; but I must confess I am in the dark regarding its nature and source," said Mr. Giddings. "What is it, anyway?"

"I will refer your question to Paul here," replied John. "He is the one who worked out this idea of using helium in an airplane and giving it the best properties of a dirigible without any of the dirigible's handicap of clumsiness and excessive wind resistance. He has been studying the properties of helium in school, also the flight of birds."

"Well, not to get into a tiresome discourse, as Professor Herron would say, I shall make this description very rudimentary," said Paul, with a smile. "During a total eclipse of the sun in India in 1868, Lockyer, a British astronomer, saw in the spectroscope a bright, yellow line of light around the sun. He called it helium, after the Greek word for sun. So much for him. Twenty-seven years later an element was found on earth in natural-gas in Kansas, which gave the same bright, yellow light viewed through the spectrum. The people, finding it would not burn, disgustedly let millions of barrels of this valuable element escape into the air, before a scientist told them that it was of untold value for balloon and airship purposes. It is thought the gas comes from radium deposits. It has never been found in any country except the United States, and only here in Kansas and northern Texas, where it occurs in sands from 14,000 to 16,000 feet deep. Our government is now securing about 50,000 cubic feet of helium per day, refusing to sell it to foreign countries, as it is all needed here, besides which it might be used against us in case of another war."

While Paul had been telling this, Mr. Giddings had been busy jotting something down in shorthand in a notebook.

"Pardon me, Paul," he said, looking up with a smile, "but this is so mighty interesting that, before I knew it, my old-time reportorial instinct had gotten the best of me, and I found my pencil at work. If you have no objection I should like to use this in the columns of the Daily Independent some time when it seems to fit in."

"No objection at all, sir," assured Paul.

Mr. Giddings began twirling the little twelve-inch two-bladed propeller at the nose of the model airplane. "What do you use for power to turn this propeller?" he asked, after admiring its perfect proportions for a moment. "I don't see any rubber-bands, such as Robert here has always used on his little machines."

John deftly lifted off the thin veneer hood of the airplane, and disclosed a very small four-cylindered rotary pneumatic engine of bewitching simplicity and lightness, which a baby could have held out in its pudgy palm.

"Paul has worked this little motor out of aluminum and brass and steel, from odds and ends," said John.

"With more or less help on the part of my elder brother," interjected

Paul.

"Well, perhaps with a little," admitted John, "more suggestive than otherwise."

"What sets it going?" questioned Bob, curiously.

"The fuselage is divided into three sections," said Paul. "The forward section contains the engine here; the rear section is an airtight chamber containing helium; and the central section is also an airtight chamber, but contains ordinary air which has been pumped into it through a valve, using the bicycle pump John is carrying, until it is under strong pressure. When I turn this little valve an outlet is opened for the air to escape by a tube into branches communicating with each of these four cylinders. This works the tiny pistons, much the same as gas in a gasoline-motor, and they turn the little crank-shaft to which they are connected, and the crank-shaft in turn revolves the propeller on its end."

"Wonderfully simple!" Mr. Giddings exclaimed. "Wonderfully ingenious, too! Is this your invention, young men?"

"Partly, sir," replied Paul. "I understand, a company in New York is making a somewhat similar pneumatic motor for model airplanes, but John and I have made some radical improvements, to our notion. To-day's test will tell the story."

"Let's see the propeller spin 'er up once for the fun of it," suggested Bob. "It won't do any harm, will it? Dad and I will hold on to the airplane."

"Get a good grip then," warned John Ross, "for you will find there's a terrific pull to the little rascal. Paul and I tried her in that fashion early this morning down in the basement."

Bob and his father secured firm holds of the little Sky-Bird, one on each side, where the propeller could not strike them.

"Ready?" asked Paul, with a smile.

"Ready!" came the answer in unison.

Paul touched the little valve in the tank chamber of the fuselage. The next moment there was a quiver, and then the propeller began fairly to hum. A strong, steady gust of air began to blow in the faces of the Giddingses, while they had to hang on grimly in order to keep their little charge from jumping out of their arms and dashing away into the air. For fully three minutes the propeller continued to whirl with undiminished speed, then slowly it began to slow up, and finally stopped.

Both Mr. Giddings and his son wiped their hot brows as they handed the plane over to its makers.

"Whew!" said Bob, "that little mule has got a lot of pull to her."

"That she has," supplemented his father. "What sort of material is her frame made of?"

"Balsa-wood," said John.

"I never heard of that. Is it something new?"

"Yes,-to the arts of civilization, but I presume it has been used by the Indians of Ecuador, where it grows, for scores of years in the making of rafts, for which it is particularly well adapted. The tree looks much like our southern cottonwood, and the wood apparently has no grain. It has a surprising toughness and strength, and is a trifle over half the weight of cork, weighing only 7.8 pounds per cubic foot, while the same sized piece of cork weighs 13.7 pounds."

"Has this wood ever been used in constructing full-sized airplanes?" asked Mr. Giddings.

"I think not; but Paul and I believe it will be the coming wood for them," said John with enthusiasm. "We have used it plain on this machine. On a large airplane it ought to be reinforced with transverse sections of very thin spruce laid latticewise. That would add considerably to its natural strength, and increase the total weight very little."

"H'm, h'm!" said the great newspaper publisher, "this is very interesting, I am sure. Now let us see how this little affair behaves itself in the air."

Paul and his brother led the way out into one corner of the big field, so as to bring what slight breeze might spring up into the head of the airplane, explaining that machines without a pilot would keep a better keel under such conditions. John then carefully attached the bicycle-pump and recharged the air-tank, following which he took out his watch to time the flight. Mr. Giddings and Bob also took out their watches.

Paul set the little Sky-Bird down on the hard earth, in a spot where there was no grass or other obstacle, and with his finger on the air-valve, said: "Practically all rubber-band motors require starting the model airplane off by picking it up and tossing it away from you up into the air; but I think this machine will rise from the ground like a large plane, on account of its great lightness and unusual power. We will now see if I am right."

To tell the truth, this being the first time he had really tried the Sky-Bird in a flight, Paul was nervous as he turned the valve, removed his hands from the graceful little plane, and straightened up.

With a whirr like the wings of a partridge as it is flushed out of the grass by the huntsman's dog, the small machine shot forward a few feet over the smooth ground, then gracefully arose in the air and started away toward the opposite corner of the field. As it proceeded it continued to rise, until it reached a height of possibly ninety or a hundred feet, when it began to dip unsteadily.

"It's a gust of wind striking it," remarked John uneasily. "I hope she weathers it. If there was only a pilot in her now, he could--"

But even as he spoke the Sky-Bird seemed to recover her balance. Making a pretty circle, away she sped on her course, neither rising nor falling. Like a real bird she sailed onward, the noise of her whirring propeller now lost to her fliers, but her little pale-yellow silk wings against the blue sky plainly tracing her course for them. Paul was running after her now as fast as his legs could carry him. What if she should keep right on and go over the far fence?-he might lose the little darling!

That fence was a good half-mile away. For his pet to cover such a distance had not seemed within the bounds of probability to either himself or John at the start, for all of their great confidence in the flying powers of the new model. Now, as he kept on running and the Sky-Bird continued going with no sign of dropping, Paul really became alarmed for her safety in landing.

But just before it reached the boundary of the grounds, the youth saw that the airplane was slowly settling. Into the next field it flew, and the high board fence shut it from Paul's view as he came up to it. With a jump he caught the top boards, and scrambled up, springing down on the opposite side. It was to see his little machine just miss the branches of an oak tree and settle down into some long grass about a hundred yards beyond.

He found it undamaged, and hurried back to his friends in the fair-grounds, his heart beating jubilantly at the splendid results of the flight. He hugged the small airplane to his heart as if it were the most precious possession in the world, as indeed it was to him.

Mr. Giddings and Bob were loud in their praise, and John smiled in that quiet way that told the younger brother how well pleased he was. It was found that the Sky-Bird had passed over the lower fence in just one minute and three seconds, which was certainly good speed for such a diminutive contrivance. Several other flights were then made, all of which were equally successful. At the conclusion Bob Giddings was so excited that he could hardly stand still.

"Dad, isn't this little thing simply a wonder?" he exclaimed. "I'd give anything in the world if I could own a big fellow built on this principle. I'll bet it would pass anything now made."

His father looked thoughtful for a moment. Then, turning to the Ross brothers, he observed:

"Do you think, boys, that these features could be successfully applied to a full-sized airplane?"

"There's no doubt at all about it, to my mind, sir," replied John Ross. "That's the next thing Paul and I propose doing, although I expect we shall have a hard time getting enough money to meet the expense of materials. Of course we shall have the regular type of gasoline engine in place of this pneumatic arrangement, as this principle won't apply to big machines. I figure a 400 horse-power Liberty engine would carry such a machine two hundred miles an hour."

Again Mr. Giddings was silent a moment. Then he resumed: "John, I hear that you have been laid off from your Air Mail job. Is that right?"

"It is, sir."

"Well, then, I am going to make a proposition to you and Paul, and in a way Robert may consider himself involved, too, I expect. As you may know, Robert plans to be an electrical engineer, and Mrs. Giddings and myself are anxious to encourage him in every way we can. For some time he has been experimenting with wireless telegraph and telephone apparatus, and has made some sets of the latter which it seems to me are an improvement over anything now on the market, particularly a set for airplane use, which he has no means of properly testing out on account of the lack of the airplane. Now my proposition is just this: I will meet every expense of making a first-class full-sized airplane like the Sky-Bird, and pay you, John, a wage equal to that which the government allowed you as a pilot, if you three young men here will do the construction work secretly, and if Robert may be allowed a one-third interest in the venture, both in the plane to be made, and in any future benefits to be derived from the patent rights."

Of course the delighted John and Paul accepted this splendid offer, and Bob Giddings was so happy at the prospect of a fine big airplane in which to install his wireless apparatus that he actually hugged his father. They repaired to the Giddings home, and there, in true business form, a contract was drawn up and duly signed by all interested parties, with a notary's seal attached.

With a copy in their possession, the Ross boys hurried home, after having dinner with the Giddings family, to acquaint Mrs. Ross with the good news.