Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 386
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… … 1551. CORRECT PRINCIPLE insetting a hot-water house boiler. H, E, circulating pipes. B, water-back or coil. K, draw-off. D, cold-water supply, extending downon inside of boiler. G, hot-water supply taken from top ofboiler.
Mechanical movements
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