A natural philosophy : embracing the most recent discoveries in the various branches of physics, and exhibiting the application of scientific principles in everyday life .. (1899)
Quackenbos, G. P. (George Payn), 1826-1881 · New York, Cincinnati [etc.], American book company · leaf 210
ished. In the focus of A is placed a red-hot ball C. This ball radiates heatin all directions, and some of its rays strike the mirror A, from which theyare reflected in parallel lines to B. By B they are again reflected and broughtto a focus at D, where a thermometer indicates a rise of…
Physics
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