. The prospector's field-book and guide in the search for and the easy determination of ores and other useful minerals. A, the blue or reducing flame; B, the oxidizing flame; C, the end of By placing the end of the blow-pipe in the flame thus, the oxidizing flame,A, is made more efficient. blade will pick it and the soda up. In this experi-ment a piece of red or brown hematite, or a piece ofpyrite (iron pyrites), should be used, as neither willbe attracted by the knife-blade before the ore is re-duced to metallic iron. The reason for this actionon the part of the ore is that the
. The prospector's field-book and guide in the search for and the easy determination of ores and other useful minerals. A, the blue or reducing flame; B, the oxidizing flame; C, the end of By placing the end of the blow-pipe in the flame thus, the oxidizing flame,A, is made more efficient. blade will pick it and the soda up. In this experi-ment a piece of red or brown hematite, or a piece ofpyrite (iron pyrites), should be used, as neither willbe attracted by the knife-blade before the ore is re-duced to metallic iron. The reason for this actionon the part of the ore is that the ore is metallic ironcombined with oxygen, and the R or blue flame calls THE BLOW-PIPE AND ITS USES. 51 for more oxygen than it possesses, so that when it isturned upon the hot oxide of iron it takes theoxygen it calls for, from the ore and leaves the ironin a metallic state. But in the pyrite, which is ironand sulphur, the latter is partially driven off byeither flame; and this process, on a larger scale, iscalled roasting. The soda absorbs a part of thesulphur and part remains in the iron, but not somuch but that the magnetized knife-blade will at-tract it. The last experiment is good for exper
Size: 2809px × 890px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectprospec, bookyear1903
