degres. manipulating the guns, and for ammunition service— These data, modified by proper corrections, as given below, enable the other sides of the triangle to be these are but the preliminary steps toward effective computed, thus giving the exact range or distance of harbor defense.… … gighteen years-and recorded in the reports scope be specially designed for the work. The Lewis Depression Position Finder. of the’ Beard of Ordnance and: Fortifications The American government is indebted to during this period. ‘Fhe fundamental: basis Major I. N. Lewis of the Coast Artillery for ef…
Internet Archive · Public domain (published before 1931). Free to use for anything.
