Tyndall, John, 1820-1893 · New York, D. Appleton · leaf 421
teadiness was introducedthrough oxidation. The heat issues from the incandescentspiral by the opening d, which is an inch and a half indiameter. Behind the spiral, finally, is a metallic re-flector, r, which augments the flux of heat without sen- 396 HEAT A MODE OF MOTION. ieci. xtv. sibly changing… … diately understood from the rough sketch given in fig. 110.A is the platinum lamp just described, heated by a currentfrom a Groves battery of five cells. Means were devisedto render this lamp perfectly constant throughout the day.In front of the spiral, and with an interior reflecting sur-face, is…
Heat
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