Tyndall, John, 1820-1893 · New York, D. Appleton · leaf 471
clearly-defined image of the points being stamped uponthe metal. Fig. 116 represents the thermograph of thecarbons. Blackened paper was now substituted for the platinumin the exhausted receiver. Placed at the focus of in-visible rays, the paper was instantly pierced, and a cloudof smoke fell like a…
Heat
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
