The Assayer's Guide; Or, Practical Directions to Assayers, Miners, and Smelters: For the Tests and Assays, by Heat and Wet Processes, of the Ores of All the Principal Metals, of Gold and Silver Coins and Alloys, and of Coal, &c |
From inside the book
Results 1-5 of 14
Page 17
... course of Assays by Heat . AMONG the articles necessary for an assayer's office , of course the first that requires a description is the furnace . For most purposes the muffle furnace suffices , and it is the only one used for gold ...
... course of Assays by Heat . AMONG the articles necessary for an assayer's office , of course the first that requires a description is the furnace . For most purposes the muffle furnace suffices , and it is the only one used for gold ...
Page 18
... course varies according to the size of the muffle , which again should depend on the quantity of assays expected to be performed at once . The back and the mouth of the muffle are equal in size . The muffle furnace is exhibited from in ...
... course varies according to the size of the muffle , which again should depend on the quantity of assays expected to be performed at once . The back and the mouth of the muffle are equal in size . The muffle furnace is exhibited from in ...
Page 25
... course , if there is also a muffle furnace on the same hearth , it is best to conduct the chimneys of both into one large one . On placing the crucibles in this furnace - twelve have room in it at once - a piece of firebrick , K in the ...
... course , if there is also a muffle furnace on the same hearth , it is best to conduct the chimneys of both into one large one . On placing the crucibles in this furnace - twelve have room in it at once - a piece of firebrick , K in the ...
Page 26
... course of the process , and form ore compact mass . On the foregoing pages I have furnished descriptions and measurements of furnaces , which , as I have already remarked , though easily constructed , are not portable ; and it is proper ...
... course of the process , and form ore compact mass . On the foregoing pages I have furnished descriptions and measurements of furnaces , which , as I have already remarked , though easily constructed , are not portable ; and it is proper ...
Page 27
... the furnaces used in the course of the experiments elucidated in the following pages , I shall venture to call the reader's attention to other instruments used in the assays of ores . Among DESCRIPTION OF IMPLEMENTS . 27.
... the furnaces used in the course of the experiments elucidated in the following pages , I shall venture to call the reader's attention to other instruments used in the assays of ores . Among DESCRIPTION OF IMPLEMENTS . 27.
Other editions - View all
Common terms and phrases
A. A. FESQUET added alloy American amount of silver antimony Appendix aqua regia Architect ascertain assay assayer black flux Boilers borax BRANNT brick button BYRNE Calculating carats carbon charcoal Chemical Chemist and Engineer Chemistry chloride Civil Engineer clay cloth Coal Coins Colors Complete Practical Comprising Construction Containing copper Cotton crucible cupels Distillation Dyeing edition employed Fabrication Formulæ Franklin Institute French gineer Hand-Book heat HENRY CAREY Hessian Hessian crucible I2mo Illustrated inch Instructions iron JOSHUA ROSE latter litharge Louis coined Manufacture Mechanical melting mercury metal Metallurgy method Minerals Mining mixed muffle furnace muriatic acid necessary nitric acid numerous oxide per-centage peroxide piece platinum Pound powdered Practical Treatise procured produced Professor pure lead pure silver quantity quartz quicksilver Receipts retort Royal Rules Sheet-Iron slag specific gravity Steam Steam-Engine Steel sulphur sulphuret Tables tains tion tongs Translated various Varnishing weight wet processes WILLIAM wood engravings
Popular passages
Page 26 - ... Problems ; also, Practical and Simple Rules for Describing the various Patterns required in the different branches of the above Trades. By REUBEN H. WARN, Practical Tin-Plate Worker. To which is added an Appendix, containing Instructions for Boiler- Making, Mensuration of Surfaces and Solids, Rules for Calculating the Weights of different Figures of Iron and Steel, Tables of the Weights of Iron, Steel, etc.
Page 20 - RIFFAULT, VERGNAUD, and TOUSSAINT.— A Practical Treatise on the Manufacture of Colors for Painting : Comprising the Origin, Definition, and Classification of Colors; the Treatment of the Raw Materials ; the best Formulae and the Newest Processes for the Preparation of every description of Pigment, and the Necessary Apparatus and Directions for its Use ; Dryers ; the Testing, Application, and Qualities of Paints, etc., etc.
Page 10 - FAIRBAIRN.— The Principles of Mechanism and Machinery of Transmission • Comprising the Principles of Mechanism, Wheels, and Pulleys, Strength and Proportions of Shafts, Coupling of Shafts, and Engaging and Disengaging Gear. By SIR WILLIAM FAIRBAIRN, Bart CE Beautifully illustrated by over 150 wood-cuts.
Page 17 - FORMULAE for finding the Discharge of Water from Orifices, Notches, Weirs, Pipes, and Rivers. With New Formulae, Tables, and General Information on Rain-fall, Catchment-Basins, Drainage, Sewerage, Water Supply for Towns and Mill Power. By JOHN NEVILLE, Civil Engineer, MRIA Third Edition, carefully revised, with considerable Additions.
Page 6 - TRAMWAYS: THEIR CONSTRUCTION AND WORKING. Embracing a Comprehensive History of the System ; with an exhaustive Analysis of the Various Modes of Traction, including Horse Power, Steam, Cable Traction, Electric Traction, &c.
Page 21 - ROSE.— The Complete Practical Machinist : Embracing Lathe Work, Vise Work, Drills and Drilling, Taps and Dies, Hardening and Tempering, the Making and Use of Tools, Tool Grinding, Marking out Work, etc.
Page 14 - LANDRIN.— A Treatise on Steel: Comprising its Theory, Metallurgy, Properties, Practical Working, and Use. By MHC LANDRIN, Jr., Civil Engineer. Translated from the French, with Notes, by AA FESQUET, Chemist and Engineer. With an Appendix on the Bessemer and the Martin Processes for Manufacturing Steel, from the Report of A bram S.
Page 2 - Marble Worker's Manual: Containing Practical Information respecting Marbles in general, their Cutting, Working and Polishing ; Veneering of Marble ; Mosaics ; Composition and Use of Artificial Marble, Stuccos, Cements, Receipts, Secrets, etc., etc. Translated from the French by ML BOOTH. With an Appendix concerning American Marbles. I2mo., cloth $1.50 BOOTH and MORFIT.— The Encyclopaedia of Chemistry, Practical and Theoretical : Embracing its application to the Arts, Metallurgy, Mineralogy...
Page 25 - Artificial Manures : Their Chemical Selection and Scientific Application to Agriculture. A series of Lectures given at the Experimental Farm at Vincennes, during 1867 and 1874-75. By M. GEORGES VILLE. Translated and Edited by WILLIAM CROOKES, FRS Illustrated by thirty-one engravings. 8vo., 450 pages ...... $6.00 VILLE.
Page 1 - Long-Span Railway Bridges, comprising Investigations of the Comparative Theoretical and Practical Advantages of the various adopted or proposed Type Systems of Construction, with numerous Formulae and Tables giving the weight of Iron or Steel required in Bridges from 300 feet to the limiting Spans ; to which are added similar Investigations and Tables relating to Short-span Railway Bridges.