Laboratory Instructions for Fire Assays of Gold Silver And Lead Mining 107 a
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To quickly assess the difficulty of the text, read a short excerpt:
122-126. Bodeman & Kerl: Assaying, pp. 107-116. Brown: Assaying, pp. 195-214.
ASSIGNMENT 6 SCORIFICATION ASSAY OF SILVER ORES Preparation of the charge : On all assays the following method of selecting the portion of ore to be assayed (assuming that the sample is correct and ground to pass a 100-mesh, or finer, sieve) should be rigidly followed. If there be any doubt as to the uniformity of the sample, pour out on a piece of glazed paper and remix, then replace the sample in the bottle or bag. ...Assay charges are then to be taken direct from the bottle or bag by means of a spatula.
Consult your lecture notes for an explanation of this method of selecting the portion of ore to be assayed.
Copper spoons are provided for measuring the granulated lead.
Measure one-half the lead required into the scorifier, add the ore, mix with the spatula, spread the remaining half of the lead over the charge, and sprinkle with borax glass over all.
Sample A silver-lead ore.
Prepare six charges as follows : Ore i/ 10 A.
What to read after Laboratory Instructions for Fire Assays of Gold Silver And Lead Mining 107 a?
You can find similar books in the "Read Also" column, or choose other free books by Walter S Morley to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
122-126. Bodeman & Kerl: Assaying, pp. 107-116. Brown: Assaying, pp. 195-214.
ASSIGNMENT 6 SCORIFICATION ASSAY OF SILVER ORES Preparation of the charge : On all assays the following method of selecting the portion of ore to be assayed (assuming that the sample is correct and ground to pass a 100-mesh, or finer, sieve) should be rigidly followed. If there be any doubt as to the uniformity of the sample, pour out on a piece of glazed paper and remix, then replace the sample in the bottle or bag. ...Assay charges are then to be taken direct from the bottle or bag by means of a spatula.
Consult your lecture notes for an explanation of this method of selecting the portion of ore to be assayed.
Copper spoons are provided for measuring the granulated lead.
Measure one-half the lead required into the scorifier, add the ore, mix with the spatula, spread the remaining half of the lead over the charge, and sprinkle with borax glass over all.
Sample A silver-lead ore.
Prepare six charges as follows : Ore i/ 10 A.
What to read after Laboratory Instructions for Fire Assays of Gold Silver And Lead Mining 107 a?
You can find similar books in the "Read Also" column, or choose other free books by Walter S Morley to read onlineMoreLess
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