. The prospector's field-book and guide in the search for and the easy determination of ores and other useful minerals. m a ton ofa lode. Take a number of samples from differentparts, both length and breadth. The drillings fromthe blasting bore-holes collected make the best finely triturated weigh off one or two pounds,place in a black iron pan (it must not be tinned)with 4 ounces of mercury, 4 ounces common salt, 4ounces soda, and about half a gallon of boiling with a stick, stir the pulp constantly, occasion- * Getting Gold. London, 1897. GOLD. 121 ally swirling the dish
. The prospector's field-book and guide in the search for and the easy determination of ores and other useful minerals. m a ton ofa lode. Take a number of samples from differentparts, both length and breadth. The drillings fromthe blasting bore-holes collected make the best finely triturated weigh off one or two pounds,place in a black iron pan (it must not be tinned)with 4 ounces of mercury, 4 ounces common salt, 4ounces soda, and about half a gallon of boiling with a stick, stir the pulp constantly, occasion- * Getting Gold. London, 1897. GOLD. 121 ally swirling the dish as in panning off, till you feelcertain that every particle of the gangue has comein contact with the mercury. Then carefully panoff into another dish so as to lose no got your amalgam clean, squeeze it througha piece of chamois leather, though a good qualityof new calico previously wetted will do as resulting pill of hard amalgam can then bewrapped in a piece of brown paper, placed on anold shovel, and the mercury driven off over a hotfire. Or a clay tobacco pipe, the mouth being Fig. stopped with clay, makes a good retort. To makesuch a retort, Fig. 45, take two new tobacco pipessimilar in shape, with the biggest bowls and longeststems procurable. Break off the stem of one closeto the bowl and fill the hole with well-worked the stemless pipe on end in a clay bed, and fillwith amalgam, pass a bit of thin iron or copperwire beneath it, and bend the end of the wireupwards. Now -fit the whole pipe, bowl inverted,on to the under one, luting the edges well with the wire over the top with a pair of nippers 122 till the two bowls are fitted closely together, andyou have a retort that will stand any heat neces-sary to thoroughly distill mercury. The residue,after the mercury has been driven off, will be re-torted gold, which, on being weighed and the resultmultiplied by 2240 for 1 pound assay, or by 1120for two pounds, will give the am
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