Professional Papers of the Corps of Royal Engineers, Volume 7

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Page 21 - A 16-in. common shell burst with 8 feet 6 inches penetration, and made a crater about 10 feet in diameter at the face of the -wall. This was one of the best results obtained. The shell struck near the base of the wall. Hange about 1 ,500 yards. At Fort Pharos the 10-inch shell, common and Palliser, penetrated the 8-feet rubble walls of the casemates and burst inside.
Page 32 - It is probable that for the immediate present the 40 feet of protection aimed at with our magazines is sufficient, but it will not be so for long.
Page 4 - The penetration of shells fired at angles of elevation between 40 and 60 are nearly double those at 30.
Page 18 - Lectures, reiterated his opinion that " ships attacking a properly built and manned fortress will fight at short ranges." It is not easy to see why, when worthily opposed, ships should adopt tactics for which they have shown no preference in attacking weak and badly manned defences ; and it is certain that mines, of which ships are not indisposed to take account, will in many cases prevent close quarters...
Page 14 - Where several conductors are joined in one system, the vertical conductors should bo connected both near the top, and at the ground line.

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