The Assayer's Guide; Or, Practical Directions to Assayers, Miners and Smelters, for the Tests and Assays, by Heat and by Wet Processes, of the Ores of All the Principal Metals, of Gold and Silver Coins and Alloys, and of Coal, &c: By Oscar M. Lieber ... |
From inside the book
Results 1-5 of 19
Page 10
... mercury ; Definition of the term dokimastic test ; Manner of making the assay IX . ASSAY OF GOLD BY WASHING . On what the assay is based ; Its employment in Cali- · 106 fornia ; Vessels used · 108 Execution of the assay - 109 X. ASSAY ...
... mercury ; Definition of the term dokimastic test ; Manner of making the assay IX . ASSAY OF GOLD BY WASHING . On what the assay is based ; Its employment in Cali- · 106 fornia ; Vessels used · 108 Execution of the assay - 109 X. ASSAY ...
Page 87
... mercury ) is added , which will prevent the mercury from being precipitated by the sodium chloride solution ; or the mercury is previously volatilized by heating the assay sample in a small graphite crucible in the muffle . For bismuth ...
... mercury ) is added , which will prevent the mercury from being precipitated by the sodium chloride solution ; or the mercury is previously volatilized by heating the assay sample in a small graphite crucible in the muffle . For bismuth ...
Page 106
... mercury and other metals are termed . It is one that may answer for peculiar circum- stances , though it is not accurate enough to serve as a regular dokimastic * test , since lead and silver also produce amalgams . We require pure mercury ...
... mercury and other metals are termed . It is one that may answer for peculiar circum- stances , though it is not accurate enough to serve as a regular dokimastic * test , since lead and silver also produce amalgams . We require pure mercury ...
Page 107
... mercury in an iron spoon over a lamp , the gold is procured , which will , however , still be found to con- tain silver or lead , if these occur in the Dre . IX . Assay of Gold by Washing . THIS is ASSAY OF GOLD ORES BY AMALGAMATION . 107.
... mercury in an iron spoon over a lamp , the gold is procured , which will , however , still be found to con- tain silver or lead , if these occur in the Dre . IX . Assay of Gold by Washing . THIS is ASSAY OF GOLD ORES BY AMALGAMATION . 107.
Page 114
... mercury is will quickly amalgamate the interior , and if the ore 114 THE ASSAYER'S GUIDE . Example of calculating the result of the assay; Separation of the free gold from the sulphides; Preparation of an amalgamated pan.
... mercury is will quickly amalgamate the interior , and if the ore 114 THE ASSAYER'S GUIDE . Example of calculating the result of the assay; Separation of the free gold from the sulphides; Preparation of an amalgamated pan.
Contents
17 | |
44 | |
45 | |
65 | |
71 | |
79 | |
88 | |
89 | |
94 | |
101 | |
102 | |
108 | |
114 | |
116 | |
121 | |
125 | |
131 | |
139 | |
148 | |
154 | |
157 | |
160 | |
166 | |
170 | |
176 | |
182 | |
186 | |
188 | |
225 | |
231 | |
240 | |
243 | |
245 | |
250 | |
256 | |
262 | |
268 | |
271 | |
273 | |
274 | |
275 | |
279 | |
280 | |
281 | |
282 | |
8 | |
Other editions - View all
Common terms and phrases
added alkalies alloy ammonium amount of silver antimony argol arsenic ascertain assay assay-sample assayer black flux boiling borax carbon cent charcoal charge chloride cible clay coal common salt containing cool copper crucible cubic centimeters cupelled cupric oxide cyanide decanted decomposed diluted dissolved dried dryness earthy evaporate filter flask formed furnace galena glass gold grains grammes heat Hessian crucible hydrochloric acid ignited inches iron wire latter lead buttons lead oxide lime litharge mass melting mercury metallic lead method of assaying millimeters minutes mixed mixture muffle muriatic acid nitric acid particles per-centage piece placed Plate porcelain portion potash potassium potassium cyanide poured powdered precipitated present produced pulverized pyrites quantity quartz quicksilver reducing agents removed residue result roasted saltpetre sample scorifiers silica slag soda solu specific gravity sulphate of lead sulphides sulphuretted hydrogen sulphuric acid tained temperature tion tube washed weight whereby zinc
Popular passages
Page 20 - Chemical Analysis. THE COMMERCIAL HANDBOOK of CHEMICAL ANALYSIS ; or Practical Instructions for the determination of the Intrinsic or Commercial Value of Substances used in Manufactures, in Trades, and in the Arts. By A. NORMANDY, Author of "Practical Introduction to Rose's Chemistry," and Editor of Rose's "Treatise on Chemical Analysis.
Page 29 - THE ART OF SOAP-MAKING. A Practical Handbook of the Manufacture of Hard and Soft Soaps, Toilet Soaps, &c. Including many New Processes, and a Chapter on the Recovery of Glycerine from Waste Leys. By ALEXANDER WATT.
Page 7 - CAMPIN. — A Practical Treatise on Mechanical Engineering: Comprising Metallurgy, Moulding, Casting, Forging, Tools, Work, shop Machinery, Mechanical Manipulation, Manufacture of SteamEngines, etc. With an Appendix on the Analysis of Iron and Iron Ores. By FRANCIS CAMPIN, CE To which are added, Observations on the Construction of Steam Boilers, and Remarks upon Furnaces used for Smoke Prevention ; with a Chapter on Explosions. By R.
Page 25 - The Dyer's Instructor: Comprising Practical Instructions in the Art of Dyeing Silk, Cotton, Wool, and Worsted, and Woolen Goods; containing nearly 800 Receipts. To which is added a Treatise on the Art of Padding; and the Printing of Silk Warps, Skeins, and Handkerchiefs, and the various Mordants and Colors for the different styles of such work.
Page 27 - Cement and Concretes, Quantities of Materials in given Sizes and Dimensions of Wood, Brick and Stone; and full and complete Bills of Prices for Carpenter's...
Page 20 - NICHOLSON.— A Manual of the Art of Bookbinding : Containing full instructions in the different Branches of Forwarding, Gilding, and Finishing. Also, the Art of Marbling Book-edges and Paper. By JAMES B. NICHOLSON. Illustrated.
Page 18 - MAIN and BROWN. — The Marine Steam-Engine. By THOMAS J. MAIN, FR Ass't S. Mathematical Professor at the Royal Naval College, Portsmouth, and THOMAS BROWN, Assoc. Inst. CE, Chief Engineer RN Attached to the Royal Naval College.
Page 7 - Assistant : Comprising Metallurgic Chemistry; the Arts of Working all Metals and Alloys ; Forging of Iron and Steel ; Hardening and Tempering ; Melting and Mixing; Casting and Founding ; Works in Sheet Metal; the Processes Dependent on the Ductility of the Metals ; Soldering ; and the most Improved Processes and Tools employed by Metalworkers. With the Application of the Art of Electro-Metallurgy to Manufacturing Processes; collected from Original Sources, and from the works of Holtzapffel, Bergeron,...
Page 13 - The Silversmith's Handbook : Containing full instructions for the Alloying and Working of Silver, including the different modes of Refining and Melting the Metal ; its Solders ; the Preparation of Imitation Alloys ; Methods of Manipulation ; Prevention of Waste ; Instructions for Improving and Finishing the Surface of the Work ; together with other Useful Information and Memoranda. By GEORGE E. GEE.
Page 18 - Questions on Subjects Connected with the Marine Steam-Engine; And Examination Papers; with Hints for their Solution. By THOMAS J. MAIN, Professor of Mathematics, Royal Naval College, and THOMAS BROWN, Chief Engineer, RN I2mo., cloth . $1.50 MAIN and BROWN. — The Indicator and Dynamometer: With their Practical Applications to the Steam-Engine.