Smith, David Eugene, 1860-1944 · Boston, New York [etc.] Ginn and Company · leaf 250
<mzi£mt … Surveying Instrument of the Eighteenth Century N. Bions Traite de la construction . . . des instrumens de mathema-tique, The Hague, 1723 Finaeus, on this page, fshows how it was usedfor altitudes, and theone reproduced on page2-10 shows how it wasused for measuringdepths. A similar instru-ment from…
Geometry
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