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From this time we have been gradually cutting down on the size of openings for elevator supply, but under protest of the elevator agents, who have always claimed that they should be allowed at least a 4-inch opening in the mains, until we have found that under 80 to 90 pounds pressure two to four 1-inch taps will answer the purpose, provided the water pipes are of ample size.
From that time onwards, larger and faster boats began to be built, and even a certain amount of protection began to be given them, consisting of 1-inch iron plates round the boilers and engines, which was proof against small-arms, and even against the heavier Nordenfelt machine guns, except at the closest quarters.
So!" said von Hindenburg, and he glanced at a gun crew who were loading a half-ton projectile into an 11.1-inch siege-gun that stood on the pavement. "Which is the Woolworth Building?" he asked, pointing across the river. "The tallest one, Excellency the one with the Gothic lines and gilded cornices," replied one of his officers. "Ah, yes, of course. I recognise it from the pictures.
This vessel will carry two turrets, 28 feet in diameter inside, 9 feet high, and 2 feet thick, composed of 1-inch plates. Each turret contains two 15-inch guns. The other vessel, the Dictator, is similarly constructed, except that it has one turret, two guns, and 320 feet length.
In addition to 1-1/2 feet of 5 by 3/32 inch solid-drawn tubing for the main, and 3 feet of 2-1/2 by 1/16 inch tubing for the lower drums, the boiler proper requires 22-1/2 feet of 1/2-inch tubing, 19 inches of 3/4-inch tubing, 2-1/4 feet of 1-inch tubing, 1 foot of 1-1/2-inch tubing, and ends of suitable size for the four drums.
This can be formed of dry cells or you can use a storage battery to energize your coil. For all coils that give less than a 1-inch spark you should use 5 dry cells; for 1-and 2-inch spark coils use 6 or 8 dry cells, and for 3 to 4-inch spark coils use 8 to 10 dry cells. The way the dry cells are connected together to form a battery will be shown presently. A dry cell is shown at A in Fig, 19.
Spark coils for wireless work are made to give sparks from 1/4 inch in length up to 6 inches in length, but as a spark coil that gives less than a 1-inch spark has a very limited output it is best to get a coil that gives at least a 1-inch spark, as this only costs about $8.00, and if you can get a 2- or a 4-inch spark coil so much the better. Types of Spark Coils for Set.
This and all the vessels to be referred to in this class are iron-clad from end to end, and from the upper deck to 4 or 5 feet below the water-line. She has three turrets upon her main-deck, each 21 feet in diameter inside, 9 feet high, and composed of 11 thicknesses of 1-inch plates. Her armament is six 15-inch guns, two in each turret.
The fact that she had sunk an American ship on the high seas opened up still another diplomatic controversy between Germany and the United States, which cannot be treated here. When she left Tsing-tau she took as her crew the men from the German gunboats Tiger and Luchs, and had their four 4.1-inch and some of their one-pounder guns as her armament.
He had with him two sister cruisers, the Scharnhorst and the Gneisenau, each of 11,400 tons and an armament of eight 8.2-inch guns, and three smaller cruisers, the Dresden, Leipzig, and Nürnberg, each about the size of the Emden, from 3200 to 3540 tons, and carrying ten 4.1-inch guns; none of them had a speed of less than 22 knots.
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