Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 717
694 EXPERIMENTAL SCIENCE. To produce a uniform continuous jet with the ordinarj-blowpipe is an attainment which, to some, is most difficult.It is very easy to state that it is only necessary to causethe mouth to maintain the jet at the instant of inspiration,but it is quite another thing to do it.… … Blowpipe Furnace. its contents through the blowpipe, principally by the actionof the tongue. Let the tyro close his lips tightly, and withhis tongue alone, independently of his lungs, force air intohis mouth until his cheeks are distended to their fullestextent. This done, and all is learned ; for…
Physics · Lantern projection · Electric apparatus and appliances
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