Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 385
r^ 1547. TRIPOD.^-The legs are pivoted on atriangular prism, which allows the legs to be foldedinto a cylindrical staff. … 1548. DOUBLE SPHERICAL SOCKET,used mostly on surveying instruments. Thesocket is clamped by drawing the plates to-gether with thumb-screw. 1549. DISC SLICER, with hopper, for cuttingroots, etc. Each slot in the disc has a knife slightlyprojecting. MISCELLANEOUS DEVICES. 375 £^S\ 1550. MICROMETER…
Mechanical movements
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