The Assayer's Manual: An Abridged Treatise on the Docimastic Examination of Ores, and Furnace and Other Artificial Products |
From inside the book
Results 1-5 of 54
Page 19
... forming it are still further comminuted , and then again formed into a heap , which is divided as before . The comminution and reduc- tion are repeated several times , finally upon an iron plate bellen , Leipzig , 1875. Landauer ...
... forming it are still further comminuted , and then again formed into a heap , which is divided as before . The comminution and reduc- tion are repeated several times , finally upon an iron plate bellen , Leipzig , 1875. Landauer ...
Page 20
... formed . The pieces of one charge are commi nuted and reduced in the manner above stated . b . Heterogeneous fragments .- ( Gold and silver ores , many copper ores , coal with slate and pyrites , etc. ) a . Sampling by the crossing ...
... formed . The pieces of one charge are commi nuted and reduced in the manner above stated . b . Heterogeneous fragments .- ( Gold and silver ores , many copper ores , coal with slate and pyrites , etc. ) a . Sampling by the crossing ...
Page 21
... formed from them . This is reduced by quarter- ing , or by the crossing method . " 1 Preuss . Ztschr . xxiv . 49. B. u . h . Ztg . 1872 , p . 232 ( Chili ) . Ann . d . Mines , 1878 , XIII . 606 ( Colorado ) . 2 Kerl , Oberharzer ...
... formed from them . This is reduced by quarter- ing , or by the crossing method . " 1 Preuss . Ztschr . xxiv . 49. B. u . h . Ztg . 1872 , p . 232 ( Chili ) . Ann . d . Mines , 1878 , XIII . 606 ( Colorado ) . 2 Kerl , Oberharzer ...
Page 34
... formed . It is then placed in the muffle of a muffle - furnace ( Fig . 25 ) and heated at a gradually increasing temperature until it glows ; the heating must be the more gradual the more fusible the sample . ( Antimonial and arsenical ...
... formed . It is then placed in the muffle of a muffle - furnace ( Fig . 25 ) and heated at a gradually increasing temperature until it glows ; the heating must be the more gradual the more fusible the sample . ( Antimonial and arsenical ...
Page 35
... formed during the oxidizing period are reduced to metallic sulphides , antimo- nides , and arsenides , while the volatile products of oxida- tion escape ( reducing roasting ) . These compounds when all the carbon has been consumed ...
... formed during the oxidizing period are reduced to metallic sulphides , antimo- nides , and arsenides , while the volatile products of oxida- tion escape ( reducing roasting ) . These compounds when all the carbon has been consumed ...
Contents
150 | |
156 | |
176 | |
184 | |
196 | |
202 | |
209 | |
215 | |
64 | |
66 | |
70 | |
76 | |
79 | |
82 | |
106 | |
113 | |
123 | |
131 | |
137 | |
139 | |
144 | |
221 | |
227 | |
233 | |
239 | |
246 | |
255 | |
275 | |
287 | |
288 | |
293 | |
297 | |
300 | |
Other editions - View all
Common terms and phrases
2.5 grammes 20 grammes added alloy ammonia ammonium antimony aqua regia argol arsenic assay sample beaker-glass bismuth black copper black flux boiled borax burette cent charcoal charge chloride coal cobalt color common salt containing copper covering of common crucible crucible Fig cubic centimeters cubic inches cupelled decanted decomposed determined diluted Dingler dried evaporated to dryness ferric oxide ferrous filtered filtrate flask fluid foreign metals Fresenius furnace fused fusion glass gold gramme 15.43 grains gramme 7.71 grains grammes 154.32 grains grammes 77.16 grains granulated lead heated hydrate hydrochloric acid ignited iron lead button liquid litharge mercury metallic sulphides meters method millimeters mixed mixture muffle muffle-furnace nickel nitric acid percentage placed platinum porcelain potassium carbonate potassium cyanide poured powdered precipitated pyrites refractory residue scorifier slag smelting sodium carbonate sodium sulphide substances sulphate sulphuretted hydrogen sulphuric acid temperature titrated tube u. h. Ztg volumetric washed weighed zinc Ztschr
Popular passages
Page 15 - Property : A Treatise on the Construction and Management of Railways ; designed to afford useful knowledge, in the popular style, to the holders of this class of property ; as well as Railway Managers Officers, and Agents. By JOHN B. JERVIS, late Chief Engineer of the Hudson River Railroad, Croton Aqueduct, etc.
Page 8 - The Encyclopedia of Chemistry, Practical and Theoretical : Embracing its application to the Arts, Metallurgy, Mineralogy, Geology, Medicine, and Pharmacy. By JAMES C. BOOTH, Melter and Refiner in the United States Mint, Professor of Applied Chemistry in the Franklin Institute, etc., assisted by CAMPBELL MORFIT, author of " Chemical Manipulations,
Page 7 - A Treatise on the Metallurgy of Iron : Containing Outlines of the History of Iron Manufacture, Methods of Assay, and Analysis of Iron Ores, Processes of Manufacture of Iron and Steel, etc., etc.
Page 7 - BELL.— Carpentry Made Easy: Or, The Science and Art of Framing on a New and Improved System. With Specific Instructions for Building Balloon Frames, Barn Frames, Mill Frames, Warehouses, Church Spires, etc. Comprising also a System of Bridge Building, with Bills, Estimates of Cost, and valuable Tables. Illustrated by forty-four plates, comprising nearly 200 figures. By WILLIAM E. BELL, Architect and Practical Builder.
Page 10 - 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 16 - A TREATISE ON A BOX OF INSTRUMENTS, And the Slide Rule ; with the Theory of Trigonometry and Logarithms, including Practical Geometry, Surveying, Measuring of Timber, Cask and Malt Gauging, Heights, and Distances. By THOMAS KENTISH. In one volume. 12mo.