时间: 2019年12月10日 11:22

Fortunately the embarrassing silence was soon broken by the happy announcement that supper was ready in the kitchen. Sophia. His noble air; his wan features.... Miss Chubb was a little shocked at this singularly prosaic and unemotional way of treating the subject of love and marriage, as to which she herself preserved the most romantic freshness of ideas. She would have liked the young couple to be like the lovers in a story-book, and the father to bestow his daughter and his blessing with tears of joy. However, she did her best to encourage Mr. Maxfield in giving his consent after his own fashion, and they parted on excellent terms with each other. ON his return to Cambridge in the May term of 1858, Ernest and a few other friends who were also intended for orders came to the conclusion that they must now take a more serious view of their position. They therefore attended chapel more regularly than hitherto, and held evening meetings of a somewhat furtive character, at which they would study the New Testament. They even began to commit the Epistles of St. Paul to memory in the original Greek. They got up Beveridge on the Thirty-nine Articles, and Pearson on the Creed; in their hours of recreation they read More鈥檚 鈥淢ystery of Godliness,鈥?which Ernest thought was charming, and Taylor鈥檚 鈥淗oly Living and Dying,鈥?which also impressed him deeply, through what he thought was the splendour of its language. They handed themselves over to the guidance of Dean Alford鈥檚 notes on the Greek Testament, which made Ernest better understand what was meant by 鈥渄ifficulties,鈥?but also made him feel how shallow and impotent were the conclusions arrived at by German neologians, with whose works, being innocent of German, he was not otherwise acquainted. Some of the friends who joined him in these pursuits were Johnians, and the meetings were often held within the walls of St. John鈥檚. In April of 1910, the Admiralty determined on a naval air service, and set about the production of rigid airships which should be able to compete with Zeppelins as naval scouts. The construction was entrusted to Vickers, Ltd., who set about the task at their Barrow works and built something which, when tested after a year鈥檚 work, was found incapable of lifting its own weight. This defect was remedied by a series of alterations, and meanwhile the unofficial title of 鈥楳ayfly鈥?was given to the vessel. Exile from England and from all the hopes and ambitions not very unnatural at my age, is not such an alluring prospect that I should be suspected of having incited Castalia to write as she has done? However, I will say no more as to my own private and personal feelings in the matter. I did not mean to allude to them. I beg your pardon. Algernon sat leaning a little forward in his chair. His hands were clasped loosely together, and rested on his knees. He kept his eyes gloomily fixed on the carpet for the most part, and only raised them occasionally to look up at Lord Seely without raising his head at the same time. "I could not write what I had to say to you, my lord. I dared not write it. Perhaps, even, if I had written, the letter might not have reached you at once; and I could not wish its falling into other hands, so I came away from Whitford last night quite suddenly. I have no leave of absence; the clerk at the post-office, even, did not know I was coming away." 一道本高清免费字幕 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? 鈥淪he has been the comfort and mainstay of my life for more than thirty years,鈥?said Theobald as soon as all was over, 鈥渂ut one could not wish it prolonged,鈥?and he buried his face in his handkerchief to conceal his want of emotion. � 鈥淵ou would have to learn the business from the beginning,鈥?said Fortinbras quickly. 鈥淭hat would be easy, as you would have willing instructors, and as you are not deficient in ordinary intelligence. You would rise every day in self-esteem and dignity and at last find yourself of use in the social organism.鈥? 鈥楬err Lilienthal kindly allowed me to sail down his hill in one of these double-surfaced machines last June. With the great facility afforded by his conical hill the machine was handy enough; but I am afraid99 I should not be able to manage one at all in the squally districts I have had to practise in over here.