"Mr. Doyle isn't here, I suppose?" You are wonderfully energetic, Gibbs. An invaluable public servant. But, Gibbs, it will not, I think, be any part of your duty to mention to any one at present the losses I have spoken of from my secretaire. There is no reason, as yet, to connect them with the missing letters. I did not duly consider what I was saying. The papers, after all, were only private letters of my own, Gibbs. They concern no one but myself. One was a mere note鈥攁n invitation from a lady. They could have had no value for a thief, you know. I鈥擨 daresay I mislaid it, and never put it into the secretaire at all. Who could tell how it got abroad in the town that young Mrs. Errington was in the habit of following her husband about; of watching him, spying on his actions, and examining his private correspondence? Mr. Obadiah Gibbs, who could have told more than any one on the latter head, was not given to talking. Yet the fact oozed out. pk10三码必中冠军计划 You are wonderfully energetic, Gibbs. An invaluable public servant. But, Gibbs, it will not, I think, be any part of your duty to mention to any one at present the losses I have spoken of from my secretaire. There is no reason, as yet, to connect them with the missing letters. I did not duly consider what I was saying. The papers, after all, were only private letters of my own, Gibbs. They concern no one but myself. One was a mere note鈥攁n invitation from a lady. They could have had no value for a thief, you know. I鈥擨 daresay I mislaid it, and never put it into the secretaire at all. These comments are taken from a lecture delivered by Wilbur Wright before the Western Society of Engineers in September of 1901, under the presidency of Octave Chanute. In that lecture Wilbur detailed the way in which he and his brother came to interest themselves in aeronautical problems and constructed their first glider. He speaks of his own notice of the death of Lilienthal in 1896, and of the way in which150 this fatality roused him to an active interest in aeronautical problems, which was stimulated by reading Professor Marey鈥檚 Animal Mechanism, not for the first time. 鈥楩rom this I was led to read more modern works, and as my brother soon became equally interested with myself, we soon passed from the reading to the thinking, and finally to the working stage. It seemed to us that the main reason why the problem had remained so long unsolved was that no one had been able to obtain any adequate practice. We figured that Lilienthal in five years of time had spent only about five hours in actual gliding through the air. The wonder was not that he had done so little, but that he had accomplished so much. It would not be considered at all safe for a bicycle rider to attempt to ride through a crowded city street after only five hours鈥?practice, spread out in bits of ten seconds each over a period of five years; yet Lilienthal with this brief practice was remarkably successful in meeting the fluctuations and eddies of wind-gusts. We thought that if some method could be found by which it would be possible to practise by the hour instead of by the second there would be hope of advancing the solution of a very difficult problem. It seemed feasible to do this by building a machine which would be sustained at a speed of eighteen miles per hour, and then finding a locality where winds of this velocity were common. With these conditions a rope attached to the machine to keep it from floating backward would answer very nearly the same purpose as a propeller driven by a motor, and it would be possible to practise by the hour, and without any serious danger, as it would not be necessary to rise far from the ground, and the machine would not have any forward motion151 at all. We found, according to the accepted tables of air pressure on curved surfaces, that a machine spreading 200 square feet of wing surface would be sufficient for our purpose, and that places would easily be found along the Atlantic coast where winds of sixteen to twenty-five miles were not at all uncommon. When the winds were low it was our plan to glide from the tops of sandhills, and when they were sufficiently strong to use a rope for our motor and fly over one spot. Our next work was to draw up the plans for a suitable machine. After much study we finally concluded that tails were a source of trouble rather than of assistance, and therefore we decided to dispense with them altogether. It seemed reasonable that if the body of the operator could be placed in a horizontal position instead of the upright, as in the machines of Lilienthal, Pilcher, and Chanute, the wind resistance could be very materially reduced, since only one square foot instead of five would be exposed. As a full half horse-power would be saved by this change, we arranged to try at least the horizontal position. Then the method of control used by Lilienthal, which consisted in shifting the body, did not seem quite as quick or effective as the case required; so, after long study, we contrived a system consisting of two large surfaces on the Chanute double-deck plan, and a smaller surface placed a short distance in front of the main surfaces in such a position that the action of the wind upon it would counterbalance the effect of the travel of the centre of pressure on the main surfaces. Thus changes in the direction and velocity of the wind would have little disturbing effect, and the operator would be required to attend only to the steering of the machine, which was to be effected152 by curving the forward surface up or down. The lateral equilibrium and the steering to right or left was to be attained by a peculiar torsion of the main surfaces, which was equivalent to presenting one end of the wings at a greater angle than the other. In the main frame a few changes were also made in the details of construction and trussing employed by Mr Chanute. The most important of these were: (1) The moving of the forward main crosspiece of the frame to the extreme front edge; (2) the encasing in the cloth of all crosspieces and ribs of the surfaces; (3) a rearrangement of the wires used in trussing the two surfaces together, which rendered it possible to tighten all the wires by simply shortening two of them.鈥? My dear creature, said Rose, looking full at Castalia for the first time, "why, what was there to tell? The subject was led to by chance now, and I had not the least idea that you did not know all Algy's old love-stories. Everybody here鈥攅xcept, I suppose, poor dear Mrs. Errington鈥攌new of the boy-and-girl nonsense between him and that little thing. But of course it never was serious. That was out of the question." 鈥楾hey commenced the construction of a small model operated by a spring, and laid down the larger model 20 ft. from tip to tip of planes, 3? ft. wide, giving 70 ft. of sustaining surface, about 10 more in the tail. The making of this model required great consideration; various supports for the wings were tried, so as to combine lightness with firmness, strength and rigidity. I told you that the least terrible rumour about Castalia was the rumour that her mind was affected. Bobo accomplished this all right. As the clerk nonchalantly spun the card around and read the name, he caught his breath slightly, and a wonderful silkiness crept into his voice. Don't tell me of your David Powells! returned old Max, declining to discuss the subject on wide or general grounds, but doggedly confining himself to the particulars immediately before him. "Don't tell me of a man as is blown out with pride and vain glory like a balloon. Did I, or did I not, say more'n two years ago, that David Powell was getting puffed up with presumptuousness?" The Daily Mail had offered a prize of 锟?,000 for the first Cross-Channel flight, and Hubert Latham set his mind on winning it. He put up a shelter on the French coast at Sangatte, half-way between Calais and Cape Blanc Nez. From here he made his first attempt to fly to England on Monday the 19th of July. He soared to a fair height, circling, and reached an estimated height of about 900 feet as he came over the water with every appearance of capturing the Cross-Channel prize. The luck which dogged his career throughout was against him, for, after he had covered some 8 miles, his engine stopped and he came down to the water in a series of long glides. It was discovered afterward that a small piece of wire had worked its way into a vital part of the engine to rob Latham of the honour he coveted. The tug that came to his rescue found him seated on the fuselage of his Antoinette, smoking a cigarette and waiting for a boat to take him to the tug. It may be remarked that Latham merely assumed his Antoinette would float in case he failed to make the English coast; he had no actual proof. You are wonderfully energetic, Gibbs. An invaluable public servant. But, Gibbs, it will not, I think, be any part of your duty to mention to any one at present the losses I have spoken of from my secretaire. There is no reason, as yet, to connect them with the missing letters. I did not duly consider what I was saying. The papers, after all, were only private letters of my own, Gibbs. They concern no one but myself. One was a mere note鈥攁n invitation from a lady. They could have had no value for a thief, you know. I鈥擨 daresay I mislaid it, and never put it into the secretaire at all.