Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 386
—^^-—W^^ 1550. MICROMETER SCREW ADJUSTMENT.— The tangent arm is made fast or loose on the shaft bythe spring cHp and screw. Used mostly on theodo-lites and transit instruments. … 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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