Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 214
long. Several flasks ofthe same capacity were provided and filled with the differ-ent gases and vapors, and stoppered, to be used at conven-ience. Near the disk was placed a common gas flame, andinto the mouth of the flask was inserted one end of a longrubber tube, the other end being provided with… … 192 EXPERIMENTAL SCIENCE. disk being rotated so as to rapidly intercept the thermal andluminous rays of the gas flame and render the rays rapidlyintermittent, the effect on the gases and vapors containedby the different bulbs was noted. Dry air produced nosound ; moistened, it yielded a distinctly…
Physics · Lantern projection · Electric apparatus and appliances
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