Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 680
in Fig. 631 are produced bymeans of the bow in the usual wav, the bow being ap-plied at I7, and the finger at a. The black dots indicate thepoints of support of the plates. MECHANICAL OPERATIONS. 657 CHAPTER XXIIl. MECHANICAL OPERATIONS.HINTS ON GLASS BLOWING. There are few mechanical operations… … Bending :i Glass Tube. complished almost instantaneously. There is no time fordeliberation. The operator must know exactl} what to do,and then, when the conditions are favorable, he must do itquickly and with certainty. More can be learned by watching an expert glass blowerfor a half hour than can…
Physics · Lantern projection · Electric apparatus and appliances
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