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时间: 2019年12月11日 20:08

Horatia. [Aside to Barbara.] Strange, is it not? � Ader鈥檚 work is negative proof of the value of such experiments as Lilienthal, Pilcher, Chanute, and Montgomery conducted; these four set to work to master the eccentricities of the air before attempting to use it as a supporting medium for continuous flight under power; Ader attacked the problem from the other end; like many other experimenters he regarded the air as a stable fluid capable of giving such support to his machine as still water might give to a fish, and he reckoned that he had only to produce the machine in127 order to achieve flight. The wrecked 鈥楢vion鈥?and the refusal of the French War Ministry to grant any more funds for further experiment are sufficient evidence of the need for working along the lines taken by the pioneers of gliding rather than on those which Ader himself adopted. 鈥業t is a remarkable fact how this proportion of wing-surface to weight extends throughout a great variety of the flying portion of the animal kingdom, even down to hornets, bees, and other insects. In some instances, however, as in the gallinaceous tribe, including pheasants, this area is somewhat exceeded, but they are known to be very poor fliers. Residing as they do chiefly on the ground, their wings are only required for short distances, or for raising them or easing their descent from their roosting-places in forest trees, the shortness of their wings preventing them from taking extended flights. The wing-surface of the common swallow is rather more than in the ratio of two square feet per pound, but having also great length of pinion, it is both swift and enduring in its flight. When on a74 rapid course this bird is in the habit of furling its wings into a narrow compass. The greater extent of surface is probably needful for the continual variations of speed and instant stoppages for obtaining its insect food. The old room looked very different from what it had looked in the days when Matthew Diamond used to come there to read Latin and history with Algernon Errington. There were still the clumsy beams in the low ceiling, and the old-fashioned cushioned seats in the bay-window, but everything else was changed. A rich carpet covered the floor; there were handsome hangings, and a couch, and a French clock on the chimney-piece; there was a small pianoforte in the room, too; and, at one end, a bookcase well filled with gaily-bound books. These things were the products of old Max's money. But there were evidences about the place of taste and refinement, which were due entirely to Rhoda. She had got a stand of hyacinths like those in Miss Bodkin's room. She had softened and hidden the glare of the bright, brand-new upholstery by dainty bits of lacework spread over the couch and the chairs; and she had, with some difficulty, persuaded her father to substitute for two staring coloured French lithographs, which had decked the walls, a couple of good engravings after Italian pictures. There was a fire glowing redly in the grate, and the room was warm and fragrant. Rhoda was curled up on the window-seat, with a book in her hand, and bending down her pretty head over it, until the soft brown curls swept the page. � av电影在线观看,欧美一级高清片,日本黄区免费,日本av,亚洲第一成年网站视频 Charles. Because we were not able to raise a Sovereign amongst us. We were sadly cut up. � We would very much like to recommend purchase of the stock . . . Unfortunately, however, the future ofthe company appears uncertain, and we think that Wal-Mart is one of those threshold companies thatruns the risk of stumbling. In a review of progress such as this, it is obviously impossible, when a certain stage of development has been reached, owing to the very multiplicity of experimenters, to continue dealing in anything approaching detail with all the different types of machines; and it is proposed, therefore, from this point to deal only with tendencies, and to mention individuals merely as examples of a class of thought rather than as personalities, as it is often difficult fairly to allocate the responsibility for any particular innovation. A.D. 1771-1835