Read online or download a free book: Assaying Volume 1: In Three Parts
Publisher: RareBooksClub.com (22 May 2012)
By: Charles Howard Aaron (Author)
Book format: pdf doc docx mobi djvu epub ibooks (*An electronic version of a printed book that can be read on a computer or handheld device designed specifically for this purpose.)
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1884 Excerpt: ...air dried. Eureka Mine, Arizona. Ore 10 grammes. Litharge..20 i r Soda 7 ' I ned according as the The flour was va Borax....15 Salt to cover. ore contained more or less oxidizing matter. This ore consisted of oxide and carbonate of iron, black oxide of manganese, carbonate of lime, clay, and a sprinkling of molybdate of lead and horn silver. The assay fused very quietly, and gave excellent buttons and a glassy slag. Silver King Mine, Arizona. Ore 10 grammes. Litharge 40 Soda 7 Borax 5' Flour Salt cover.. The ore contained quartz, calcite, porphyry, blende, galena, a little pyrites, heavy spar, and much native silver. Tailings from the concentrators:--Tailings 20 grammes. Litharge 60 Soda 15 Borax 10 Flour li Salt to cover. Concentrations.... 10 grammes. Litharge 50' Soda.... 10 Borax 10 Nitre 1 Scorification worked well with 8 parts lead and some borax glass. The same ore by the second system:--Ore 20 grammes. Litharge.-. 20 Soda 40 Borax 10 Flour. Nails 3. Kept in furnace 20 y minutes after subsidence. Concentrations.... 10 grammes. Litharge 20 Soda 30 Borax 5' Flour x' Nails 3 The ores of the Blind Spring District, consisting of partzite, mixed with quartz, oxide of iron, and manganese, gave good results, with three or four parts of litharge, flour, and either soda or borax, or both. With soda and not borax the slag was as liquid as could be desired, but when cold was granular. With borax the slag was glassy. The results were equal. Although partzite contains a great deal of copper, some of the ore carrying as high as thirty per cent. of that, no copper was ever got in the buttons. Whether this was due to the large proportion of litharge, or to the fact that the partzite contains the copper as an antimoniate, is not known. THE MEL...
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