Sound fills up the dredged During the past year a considerable improvement SCIENTIFIC AMERICAN some time ago. has been effected in regard to the gunnery. In battle channels, therefore, the maintenance plant will simply New Braunfels, Texas. W. MITTENDORF. practice, by which the gunnery organization… … gators of this question. class of battleships. At least two similar vessels are In building guns the bore is placed under a condi- Map Showing the Route of the Norfolk and Beaufort to be laid down, the number to be increased to three tion of initial compression either by shrinkage or by Canal for…
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