Evening Republican, Volume 23, Number 210, Rensselaer, Jasper County, 31 August 1920 — Sun as a Source of Power. [ARTICLE]

Sun as a Source of Power.

In a recent paper on this subject, Mr. C. Le Roy Meisinger records that in certain subtropical regions, where coal is scarce; such as Egypt, the Punjab, and the Karoo of * South Africa, teakwood boxes, blackened within? fitted with glass tops and properly Insulated, have been found to register from 240 to 275 deg. Fahr. In the middle of the day, and. with the addition of an auxiliary mirror, to reach even 320 deg. These boxes are used as ovens for cooking, as well as for many other purposes.—Scientific American.