CATALOGUE OF PHYSICAL INSTRUMENTS … No. 15-120 No. 15-115 15-115 SPECIFIC GRAVITY BALANCE, capacity 200 grams, sensibility 1 milligram, polished steel edges and planes. Beam, 14 centimeters long, open triangular construction, is made of aluminum alloy. Planes and edges are of steel, accurately ground and polished. Beam lift, of…
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