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 |
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Page 18
... taken in Plate I. measures eight inches across the bottom from mouth to back outside , and four inches down the back . The holes opening upwards towards the interior measure each an inch and a half lengthways , but their number of ...
... taken in Plate I. measures eight inches across the bottom from mouth to back outside , and four inches down the back . The holes opening upwards towards the interior measure each an inch and a half lengthways , but their number of ...
Page 19
... taken out , to put in a new muffle , or make other repairs when necessary . In this brickwork we have two openings , d and a . The former is only a small aperture , for insert- ing pieces of sheet iron , upon which to dry DESCRIPTION OF ...
... taken out , to put in a new muffle , or make other repairs when necessary . In this brickwork we have two openings , d and a . The former is only a small aperture , for insert- ing pieces of sheet iron , upon which to dry DESCRIPTION OF ...
Page 20
... taken out whenever it becomes necessary to remove the fire - proof clay bar , o , which holds the muffle , ( vid . fig . 2. ) As seen in fig . 3 , this bar as well as the three others shown in the little sketch affixed to fig . 2 , and ...
... taken out whenever it becomes necessary to remove the fire - proof clay bar , o , which holds the muffle , ( vid . fig . 2. ) As seen in fig . 3 , this bar as well as the three others shown in the little sketch affixed to fig . 2 , and ...
Page 36
... of fig . 1. It is used to place those cupels into the muffle , as we are thereby prevented from touch- ing the contents . In using this latter in- strument great caution should be taken not to upset the 36 THE ASSAYER'S GUIDE .
... of fig . 1. It is used to place those cupels into the muffle , as we are thereby prevented from touch- ing the contents . In using this latter in- strument great caution should be taken not to upset the 36 THE ASSAYER'S GUIDE .
Page 37
... taken not to upset the cupels . Let me first remark , that on introducing the cupels into the muffle , we always commence with No. 1 , i . e . first assay on hand , behind on the left . It may seem a very superfluous precaution to dwell ...
... taken not to upset the cupels . Let me first remark , that on introducing the cupels into the muffle , we always commence with No. 1 , i . e . first assay on hand , behind on the left . It may seem a very superfluous precaution to dwell ...
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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
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