Ericsson, John, 1803-1889 · New York : Printed for the author at "The Nation" Press · leaf 326
esents a Locatelli lamp, /> thegraduatetl circular plate on wliicb is placed the polisliedreflecting substance b, and c the tbermo-electrie pile, dshows a cluster of parallel calorific ra3s projected from thelamp, through a perforation in the .screen f, toward.-; thepolished substance b. The… … rected as shown by h, ultimately striking the face of thejiile e. The latter, it should be mentioned, is protectedagainst radiation from the lamp by a screen g. The tempe-rature imparted by the deflected radiant heat having beenrecorded, the pile is allowed to cool, and then placed in theposition…
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten10unit-187-142.webp)
