Yet, driven thus to the more serious aspect of the work, they found in the step its own reward, for the work of itself drew them on and on, to the construction of measuring machines for the avoidance of error, and, to the making of series after series of measurements, concerning which Wilbur wrote in 1908 (in the Century Magazine) that 鈥榓fter making preliminary measurements on a great number of different shaped surfaces, to secure a general understanding of the subject, we began systematic measurements of standard surfaces, so varied in design as to bring out the underlying causes of differences noted in their pressures. Measurements were tabulated on nearly fifty of these at all angles from zero to 45 degrees, at intervals of 2? degrees. Measurements were also secured showing the effects on each other when surfaces are superposed, or when they follow one another. 鈥楤ut I have really enjoyed doing it. I鈥擨 have done it for the sake of books. I like doing things for books.鈥? Although the first actual flight of an aeroplane was made by the Wrights on December 17th, 1903, it is necessary, in considering the progress of design between that period and the present day, to go back to the earlier days of their experiments with 鈥榞liders,鈥?which show the alterations in design made by them in their step-by-step progress to a flying machine proper, and give a clear idea of the stage at which they had arrived in the art of aeroplane design at the time of their first flights. Aye, there have been such. The lot has fallen upon me. I know it with a sure knowledge. It is borne in upon me with a certainty that pierces through bone and marrow. I am of the number of those that go down to the pit. Why, O Lord鈥擭ay! though he slay me, yet will I trust in Him. For he is not a man, as I am, that I should answer him, and we should come together in judgment. 日本一本道高清无码av_最新高清无码专区_在线观看中文字幕dvd_更新在线观看av_不卡的无码高清的av So much money!' Good Heavens, Castalia鈥攂ut you really have no conception of these things. Our whole income, and twice our income, is a miserable pittance. The Dormers pay their butler more. Don't things go smoothly? Have you any special troubles or difficulties in the office, Algernon? It is too bad of Uncle Val, Ancram. Charles. [Aside.] I鈥檒l change the conversation. [To Horatia.] You seem much devoted, Miss, to scientific pursuits.