Encyclopædia Britannica: Or, A Dictionary of Arts, Sciences, and Miscellaneous Literature, 11. köide,2. osaColin Macfarquhar, George Gleig A. Bell and C. Macfarquhar, 1797 |
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Page 433
... gold , it cannot be allayed with fulphur or with arfenic , probably no ore , properly fo called , exifts of this metal . Accordingly in the only mines of platina which we know , namely , the gold mines of Santafe near Carthagena , the ...
... gold , it cannot be allayed with fulphur or with arfenic , probably no ore , properly fo called , exifts of this metal . Accordingly in the only mines of platina which we know , namely , the gold mines of Santafe near Carthagena , the ...
Page 438
... Gold Ores . quantity of metal may be melted from it with profit . For you may put many common pounds of it at one fingle time into the crucible ; but then you need not obferve the proportion of lead prefcribed in the fore- going procefs ...
... Gold Ores . quantity of metal may be melted from it with profit . For you may put many common pounds of it at one fingle time into the crucible ; but then you need not obferve the proportion of lead prefcribed in the fore- going procefs ...
Page 444
... gold can be extracted . The feparation will alfo be promoted by the addition of fulphureous substances . From thefe confiderations , the Baron lays down the following rules concerning amalgamation . " 1. The ores and mixtures previous ...
... gold can be extracted . The feparation will alfo be promoted by the addition of fulphureous substances . From thefe confiderations , the Baron lays down the following rules concerning amalgamation . " 1. The ores and mixtures previous ...
Common terms and phrases
alfo alſo animalcule antimony appear arfenic becauſe body brafs cafe calcination called caufe cauſe colour confequence confiderable confifts copper Cortes diftinct diſcovered diſtance divifions earth exiftence exiſtence extenfion faid fame fays fcrew fecond feems feen fenfation fenfe fent feparated feven feveral fhall fhould fide filver fimilar fimple fingle firft firſt fituation fize flider fmall folar folid fome fomething fometimes foon fore ftate ftill ftones fubftance fubject fuch fufficient fufion fulphur fuppofe furnace fyftem glafs himſelf ideas impoffible inches inftance inftrument iron itſelf kind laft lefs likewife litharge magnifier matter meaſure metals Mexicans Mexico micrometer microſcope mind moft Montezuma moſt motion muft muſt nature neceffary obferved object occafion paffing pelvis perceive perception perfon philofophers poffible pofition prefent purpoſe pyrites quantity reafon refemblance refpect reft ſmall ſome ſpace Spaniards thefe themſelves theſe thing thofe thoſe tion tube uſed uterus veffel