The book The Analysis of Copper And Its Ores And Alloys was written by author George Lincoln Heath Here you can read free online of The Analysis of Copper And Its Ores And Alloys book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Analysis of Copper And Its Ores And Alloys a good or bad book?
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& S. 7 cm. Paper, supported by a coarsely 1 Trans. A. I. M. E. 31, 484. 172 ANALYSIS OF COPPER perforated platinum cone. Wash, filter, etc. , as in the preceding method. Cupellation. Dust the inside of the moist filter with 1. 5 grams of 30-mesh lead. Store the filters in a funnel rack until the muffle is ready, then fold each one before charring, and place it, point down, in a 1. 25 inch (3. 2 cm. ) Brownite cupel. These give higher results than bone-ash as already explained. The charring shou...ld be done in a separate muffle at very low red heat. The empty cupels should be placed in the hottest muffle for half an hour before use, and then brought down to the temperature of the cooler muffle before charring the filters. A very little lead is placed under the paper, also. When a gray ash remains, add 4. 5 to 5 grams of lead, transfer to the hottest muffle, melt down quickly, bring forward and finish in a single row at a low heat. At the same time, another set is being charred in the cooler muffle.
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