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Of all the Flying Corps photographs of war, perhaps the most striking is that taken before Ypres of the first Hun gas attack. A B.E2.C., well behind the German lines, caught sight of a strange snowball of a cloud rolling across open ground, in the wake of an east wind. It flew to investigate, and the pilot photographed the phenomenon from the rear.
Aerodromes were selected and erected, the older and less satisfactory types of machine were replaced by the stable B.E2.C., the active service squadrons were reconstructed and multiplied. To the observation of what happened behind the actual front was added the mapping of the enemy's intricate trench-mosaic. For a month or two this was accomplished by the methodical sketches of a few observers.
Of the total £E2,354,354 only £E996,223 can be accounted as military expenditure. For the remaining £E1,358,131 Egypt possesses 500 miles of railway, 900 miles of telegraph, and a flotilla of steamers. The railway will not, indeed, pay a great return upon the capital invested, but it will immediately pay something, and may ultimately pay much.
Now in B the length e f was only twice b c; but in C, e2 f2 will be found more than twice that of b2 c2. Therefore, the more slender the shaft, the greater may be the proportional excess of the abacus over its diameter. The smaller the scale of the building, the greater may be the excess of the abacus over the diameter of the shaft.
The pieces m m are bent out at the bottom, and screwed down to a base-plate extending the whole length of the boiler. The fire-bars fill the rectangle formed by the tubes B, El, and E2. A plate extends from the top of E2 to the front plate of the casing, to prevent the furnace draught being "short circuited." Boiler Fittings. Safety Valves.
Motion is communicated from the way-shafts, w and w1, by the eccentrics, and the eccentric rods, e1 e2 e3 e4, and the levers and rods belonging thereto, to the short steam valve rocking shafts levers, f1 f2 f3 f4, and the exhaust valve rocking shafts, k1 k2 k3 k4, the bearings of which are carried on brackets above the valve chests, which, being furnished with tappet levers, raise and lower the valves.
The movement of the troops, their extra pay, the supplies at the end of a long line of communications, the ammunition, the loss by wear and tear of uniforms and accoutrements, the correspondence, the rewards, all cost together less than a million sterling; and for that million Egypt has recovered the Soudan. The whole £E2,354,354 had, however, to be paid during the campaigns.
If so, when you corrected for E2, which was wrong, it'd throw you all off on P6, which was right, and so on a bad hump at almost every check-station. See?" True to prediction, the pilot ray of P6 came in almost upon the exact center of the micrometer screen, and Breckenridge smiled in relief as he began really to enjoy the trip.
The Water Circulation. The water chamber is connected by two rubber tubes with an external tank. Two short nozzles, E1 and E2, of 1/4-inch tube are soldered into the water chamber near the top and bottom for the rubber pipes to be slipped over, and two more on the water tank. For the tank one may select a discarded 1 lb. carbide tin.
"No wonder the astronomers think you birds are the ones who are gumming up their dope. Well, it's about time to plug in on E2. Here's where the fireworks start!" He closed the connections which transferred the central portion of the upper lookout screen to a small micrometer screen at Breckenridge's desk and plugged it into the first check-station.
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