OCR Text |
Show Device to Measure Molten Metal's Heat No thermometer could ever be expected ex-pected to record the temperature of furnaces or of great masses of molten metal, although the development of science along these lines has made It very necessary to determine the degree of heat In furnaces and contained con-tained in masses of metal, such as huge steel billets and great cubes of iron. The discovery that two different kinds of metal welded together produced pro-duced a current of electricity was the means of inventing a means whereby there can be determined the quantity of heat, no matter how Intense. The current Is measured by the voltage and certain temperatures produce certain cer-tain values in electrical strength, and that is the way the amount of heat Is measured in decrees of heat, and this has been found to be accurate. The principle Is applied In a device known as the radiation pyrometer. It can stand at a considerable distance from the furnace or mass of molten metal that is being tested and it will record the Internal heat conditions accurately. It Is an aid to better stefl and iron' products, and as the world progresses It will be recorded as one of the great agencies of man to enable him to delve into the mysteries of nature's laboratories. Washington Star. |