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The connecting tubes, KK, should be silver-soldered in, as the boiler, if properly made, can be worked at pressures up to 100 lbs. per square inch. The casing is of 1/20-inch sheet iron, and in five parts. The back end must be holed to allow A, B, and C to project 1 inch, and have a furnace-door opening, and an airway at the bottom, 5 inches wide and 1 inch deep, cut in it.
Agreeably to the dimensions already specified, the area of the 10-inch heater acted upon by the reflected solar rays is 331.65 square inches, the area of the 20-inch heater being 673.9 square inches. The section of the annular sunbeam whose direct rays act upon the polygonal reflector is 3,130 square inches, as before stated.
The signal was acknowledged, and presently the monitor lifted her anchor and stood over still closer to the mole, maintaining a terrific fire as she went, and receiving a 20-inch Dahlgren shell on her water-line as some slight return for the damage that she was inflicting.
Jim felt his heart stand still, for discovery now would mean the utter ruin of his project, to say nothing of the death of all of them; for a shot from one of those enormous 20-inch guns would send the frail Janequeo to the bottom like a stone, if it chanced to hit her.
Taking the Machine Division as an example, we find it supplied with one 18-inch lathe, one 14-inch lathe, one 20-inch planer, one 12-inch shaping-machine, one 20-inch drill-press, one 6-1/2-inch pipe-cutting and threading machine, one Brown and Sharpe tool-grinder, one sensitive drill-press, and, of course, the customary tools that go with these machines.
When I directed my 20-inch reflecting telescope almost at random to any part of the firmament, especially to any portion of the Milky Way, the sight of myriads of stars brought into view within the field of the eye-piece was overpoweringly sublime.
Drive a couple of wire nails into a board, and twist the ends of a piece of 1/20-inch wire round them twice. This wire constitutes a connecting rod amply strong enough to stand the pulls to which it will be subjected. Fix the rod in position. Adjusting the Wipe.
To make this point clear: the direction of the nozzle having been decided, the buckets on the trued side must in turn present their concave sides to the nozzle. Therefore B1 has its convex, B2 its concave, side facing the reader, as it were. The Nozzle is a 1-1/2 inch piece of brass bar. Drill a 1/20-inch hole through the centre.
He did not believe that "cutting off the enemy's big toe in the East was better than stabbing him to the heart." He had begun the construction of 612 new vessels ranging from "hush-hush" ships of 33 knots and 20-inch guns to 200 motor-boats, and he wished to strike for access to the Baltic, with a threat of invasion on Germany's Baltic coast.
Then affix the tie C at each end, and plane its edges off neatly. Truing the Legs. Stand the stool on end, top flat against the wall. Measure off a 20-inch perpendicular from the wall to the outside corner of each of the two upper legs. Reverse the trestle, and do the same with the legs at the other end.
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