Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 379
1531a. OMNI-TELEMETER.—For obtaining the distance of an ob-ject by two observations on a line atright angles. A, direct line ofsight through the half silvered mir-ror D; X, reflected line of sight at90° or variable by the mirrors D, F.The lever L varies the angle of themirror, F, by means of the… … 1531&. ODONTOGRAPH. — Ascribe template for laying out thecurves of the teeth of gear wheels.
Mechanical movements
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