Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 683
ssingupon the ends of the tube. Then another short length isheated and thickened in the same way, and so on untilenough material has been accumulated to form a bulb of therequired size and thickness. The tube must be continuallyturned during these operations to cause it to heat evenly. 66o… … Sa AmN V. Forming a Tee. Fig. 6373. Sealing in a Wire. ^k continually maintained to prevent the bulb from being dis-torted by its own weight. The blowing should be accomplished by means of aseries of short puffs, rather than by one long blast. A tube may be perforated by stoppingthe ends so as to…
Physics · Lantern projection · Electric apparatus and appliances
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