of the triangle to be these are but the preliminary steps toward effective they may be used equally well for direct or indirect computed, thus giving the exact range or distance of harbor defense. Position-finding service must be pro- vided, powerful searchlights installed to the ship. The most… … series of experiments covering the past of a telescope, it is essential that this tele- eighteen years and recorded in the reports scope be specially designed for the work. The Lewis Depression Position Finder. of the Board of Ordnance and Fortifications The American government is indebted to…
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