Lubrication of the engine is carried out by a full pressure system. The oil is pumped through a single manifold, with seven branches to the crankshaft main bearings, and then in turn through the hollow crankshaft to the connecting-rod big ends and thence through small tubes, already noted, to the small end bearings. The oil pump has four pistons and two double valves driven from a single eccentric shaft on which are mounted464 four eccentrics. The pump is continuously submerged in oil; in order to avoid great variations in pressure in the oil lines there is a piston operated pressure regulator, cut in between the pump and the oil lines. The two small pistons of the pump take fresh oil from a tank located in the fuselage of the machine; one of these delivers oil to the cam shaft, and one delivers to the crankshaft; this fresh oil mixes with the used oil, returns to the base, and back to the main large oil pump cylinders. By means of these small pump pistons a constant quantity of oil is kept in the motor, and the oil is continually being freshened by means of the new oil coming in. All the oil pipes are very securely fastened to the lower half of the crank case, and some cooling of the oil is effected by air passing through channels cast in the crank case on its way to the carburettor. It was in 1895 that Lilienthal passed from experiment with the monoplane type of glider to the construction100 of a biplane glider which, according to his own account, gave better results than his previous machines. 鈥楽ix or seven metres velocity of wind,鈥?he says, 鈥榮ufficed to enable the sailing surface of 18 square metres to carry me almost horizontally against the wind from the top of my hill without any starting jump. If the wind is stronger I allow myself to be simply lifted from the point of the hill and to sail slowly towards the wind. The direction of the flight has, with strong wind, a strong upwards tendency. I often reach positions in the air which are much higher than my starting point. At the climax of such a line of flight I sometimes come to a standstill for some time, so that I am enabled while floating to speak with the gentlemen who wish to photograph me, regarding the best position for the photographing.鈥? 鈥極n the other hand, there are some birds, particularly of the duck tribe, whose wing-surface but little exceeds half a square foot, or seventy-two inches per pound, yet they may be classed among the strongest and swiftest of fliers. A weight of one pound, suspended from an area of this extent, would acquire a velocity due to a fall of sixteen feet鈥攁 height sufficient for the destruction or injury of most animals. But when the plane is urged forward horizontally, in a manner analogous to the wings of a bird during flight, the sustaining power is greatly influenced by the form and arrangement of the surface. The Castle at Reinsberg.鈥擲lender Purses of Fritz and Wilhelmina.鈥擫iberality of Fritz.鈥擳he Ball at Monbijou.鈥擜dventures of Fritz and Wilhelmina.鈥擫etters.鈥擳he Interview.鈥擜necdote of the King.鈥擶ilhelmina鈥檚 Account of her Brother.鈥擬ental and Physical Maladies of the King.鈥擣rederick鈥檚 cruel Neglect of his Wife.鈥擠aily Habits of the young Prince.鈥擳he shameful Carousal. The piston of this engine was long enough to keep the ports covered when it was at the top of the stroke, and a bottom ring was provided to prevent the mixture from entering the crank case. In addition to preventing leakage, this ring no doubt prevented an excess of oil working up the piston into the cylinder. As the cylinder fired with every revolution, the valve gear was of the simplest construction, a fixed cam lifting each valve as the cylinder came into position. The spring of the exhaust valve was not placed round the stem in the usual way, but at the end of a short lever, away from the heat of the exhaust gases. The cylinders were of cast steel, the crank case of aluminium, and ball-bearings were fitted to the crankshaft, crank pins, and the rotary blower pump. Ignition was by means of a high-tension magneto of the two-spark pattern, and with a total weight of 300 lbs. the maximum output was 102 brake horse-power, giving a weight of just under 3 lbs. per horse-power. 鈥淲hatever answer may now be returned from England I will have nothing to do with it. Whether negative, affirmative, or evasive, to me it shall be as nothing. You, madam, must now choose between the Duke of Weissenfels and the Marquis of Schwedt. If you do not choose, you and Wilhelmina may prepare for Oranienburg, where you shall suffer the just penalty of mutiny against the authority set over you by God and men.鈥? av天堂网,色久久综合一本1道,vivi电影网,亚洲欧美综合中文 All the Ladies. Jacobites! SOPHIA DOROTHEA. Before passing to the year 1914 mention should be made of the feat performed by Nesteroff, a Russian, and P茅goud, a French pilot, who were the first to demonstrate the possibilities of flying upside-down and looping the loop. Though perhaps not coming strictly within the purview of a chapter on design (though certain alterations were made to the top wing-bracing of the machine for this purpose) this performance was of extreme importance to the development of aviation by showing the possibility of recovering, given reasonable height, from any position in the air; which led designers to consider the extra stresses to which an aeroplane might be subjected and to take steps to provide for them by increasing strength where necessary. 鈥淏y no means,鈥?the king replied. 鈥淲ith men like these I shall be sure of victory to-day!鈥?14 All negotiation in reference to the marriages was now apparently88 at an end. Lieutenant Katte remained at Potsdam. In the absence of Lieutenant Keith he became more than ever the friend and confidant of the Crown Prince. Wilhelmina, aware of the dissipated character of Katte, mourned over this intimacy. The king was very much annoyed by the blunder of which he himself had been guilty in insulting the court of England in the person of its embassador. He declared, in his vexation, that he would never again treat in person with a foreign minister; that his hot temper rendered it unsafe for him to do so.