air. This is due to the fact that while the air cannot absorb the heat rays, the pla- tinum can and does. DELICATE DETERMINATION OF HEAT. The next question, said the lecturer, is: Is radiation capa- In 1821, Seebeck, of Berlin, discovered that heat appliea to ble of diffusing heat? Throwing the… … his iron nag, like any other broken down steed, lost the race. paper, saturated with gunpowder, could be readily ignited in After this he planned a steai fire engine, and then a screw the focus of the image. The rays were then caused to con- propeller, which, placed in a small vessel on the Thames,…
Internet Archive · Public domain (published before 1931). Free to use for anything.
