em of defense, viz., few guns in dis-persed emplacements concealed by natural features.This system has long been advocated by Sir AndrewClarke, and it is difficult to see how any further oppo-sition can consistently be offered to it. At some competitive trials carried out last year bythe Admiralty… … IMPROVED VERTICAL CYLINDER BORING MACHINE. It does not appear necessary that quick-firing guns forthis kind of defense should be of very large caliber;probably a 5 inch gun, throwing a projectile of about40 pounds, would be the maximum required, giving apenetration of 12 inches into wrought iron.…
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