Their first balloon, made of paper, reverted to the hot-air principle; they lighted a fire of wool and wet straw under the balloon鈥攁nd as a matter of course the balloon took fire after very little experiment; thereupon they constructed a second, having a capacity of 700 cubic feet, and this rose to a height of over 1,000 feet. Such a success gave them confidence, and they gave their first public exhibition on June 5th, 1783, with a balloon constructed of paper and of a circumference of 112 feet. A fire was lighted under this balloon, which, after rising to a height of 1,000 feet, descended through the cooling of the air inside a matter of ten minutes. At this the Acad茅mie des Sciences invited the brothers to conduct experiments in Paris. 北京pk105码两期 Probably wakened to realisation of the possibilities of the aeroplane by the Rheims Meeting, Germany turned out its first plane late in 1909. It was known as the Grade monoplane, and was a blend of the Bleriot and Santos-Dumont machines, with a tail suggestive of the Antoinette type. The main frame took the form of a single steel tube, at the forward end of which was rigged a triangular arrangement carrying the pilot鈥檚 seat and the landing wheels underneath, with the wing warping wires and stays above. The sweep of the wings was rather similar to the later Taube design, though the sweep back was not so pronounced, and the machine was driven by a four-cylinder, 20 horse-power, air-cooled engine which drove a two-bladed tractor propeller. In spite of Lilienthal鈥檚 pioneer work years before, this was the first power-driven German plane which actually flew. "My dear Gibbs," it said鈥?I am off to town by the night mail. My wife's uncle, Lord Seely, is ill, and I must see him. I shall speak to him on your behalf, of course. The inheritance must soon fall to you, without waiting for the demise of the present holder. I shall be back on Wednesday at latest. Meanwhile, I trust implicitly to your discretion. Powell looked after her sadly. "If she would but pray!" he murmured. "I would pray for her. I would wrestle with the Lord on her behalf. But鈥攐f late I have feared more and more that my prayers are not acceptable; that my voice is an abomination to the Lord." The night was dark and cheerless. It was one of those murky November nights when one seems to see and breathe through a dusky gauze. The road from Ivy Lodge to Whitford was not lighted. At a long distance before her, Castalia saw a red, glowing speck, which she knew to be the lamp over the chemist's shop, kept by Mr. Barker, her landlord. After that, a few street lamps glimmered, and the town of Whitford had fairly begun. Henry Farman, who began his flying career with a Voisin machine, evolved from it the aeroplane which bore his name, following the main lines of the Voisin type fairly closely, but making alterations in the controls, and in the design of the undercarriage, which was somewhat elaborated, even to the inclusion of shock absorbers. The seven-cylinder 50 horse-power Gnome rotary engine was fitted to the Farman machine鈥攖he Voisins had fitted an eight-cylinder Antoinette, giving 50 horse-power at 1,100 revolutions per minute, with direct drive to the propeller. Farman reduced the weight of the machine from the 1,450 lbs. of the Voisins182 to some 1,010 lbs. or thereabouts, and the supporting area to 450 square feet. This machine won its chief fame with Paulhan as pilot in the famous London to Manchester flight鈥攊t is to be remarked, too, that Farman himself was the first man in Europe to accomplish a flight of a mile. Your lordship judges without knowing all the facts.