. The prospector's field-book and guide in the search for and the easy determination of ores and other useful minerals. y simply turn-ing the point of the flame upon the coal and burn-ing out a cavity. Study the two colors of a sperm candle flame(Fig. 11). Notice that there is a yellow flame out-side and nearer the top, and then within the flamethere may be seen a bluish, probably a true blueflame. These flames act differently on the samesubstance. The outer 0 F, or yellow flame, iscalled the oxidizing flame, the inner, the reducingflame, R F or I F. By blowing properly, thesetwo flames may be
. The prospector's field-book and guide in the search for and the easy determination of ores and other useful minerals. y simply turn-ing the point of the flame upon the coal and burn-ing out a cavity. Study the two colors of a sperm candle flame(Fig. 11). Notice that there is a yellow flame out-side and nearer the top, and then within the flamethere may be seen a bluish, probably a true blueflame. These flames act differently on the samesubstance. The outer 0 F, or yellow flame, iscalled the oxidizing flame, the inner, the reducingflame, R F or I F. By blowing properly, thesetwo flames may be made to turn horizontally, oreven downward, and then either the 0 flame or theR flame may be turned on the assay (as the ob-4 50 PROSPECTOR S FIELD-BOOK AND GUIDE. ject on the charcoal may be called). Get a piece ofiron ore as large as a pin-head and place it in alittle cavity on the charcoal, then cover it with aquantity of soda carbonate as large as the turn the R flame down on the soda and ore,and in a few seconds the ore will melt and be re-duced to metallic iron, and your magnetized knife- FlG. A, the blue or reducing flame; B, the oxidizing flame; C, the end of theblow-pipe.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectprospec, bookyear1903
