Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 109
- be pressed intoservice. If the balances are not at hand, a pair may readily Fig, … Weighing Gases. be made of wire, as shown in the engraving. All the pivotsshould be made V-shaped, to reduce the friction to a mini-mum. The pivot of the beam should be a little higher thanthe bearing surface of the hooks at the ends of the beam.The conical scale pan may be made of paper, by…
Physics · Lantern projection · Electric apparatus and appliances
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