Silver and Gold: An Account of the Mining and Metallurgical Industries of the United States |
من داخل الكتاب
النتائج 1-5 من 48
الصفحة 18
... sulphurets , forgetting that even a small percentage of lead , copper , arsenic , or antimony , which is to be found in nearly all the gold ores of California , vitiates the mercury in a little while , rendering it quite inefficient in ...
... sulphurets , forgetting that even a small percentage of lead , copper , arsenic , or antimony , which is to be found in nearly all the gold ores of California , vitiates the mercury in a little while , rendering it quite inefficient in ...
الصفحة 33
... - mills below all the contrivances for saving gold , and have made large returns of gold , H. Ex . 211- -3 silver , concentrated sulphurets , and quicksilver , that would CONDITION OF MINING INDUSTRY - CALIFORNIA . 33.
... - mills below all the contrivances for saving gold , and have made large returns of gold , H. Ex . 211- -3 silver , concentrated sulphurets , and quicksilver , that would CONDITION OF MINING INDUSTRY - CALIFORNIA . 33.
الصفحة 34
... sulphurets , and quicksilver , that would otherwise have been lost . E The following is an assay of tailings saved at the Rhode Island Mills , Nevada , by these sluices during a run of one week : Gold , $ 75.24 ; silver , $ 76.96 ...
... sulphurets , and quicksilver , that would otherwise have been lost . E The following is an assay of tailings saved at the Rhode Island Mills , Nevada , by these sluices during a run of one week : Gold , $ 75.24 ; silver , $ 76.96 ...
الصفحة 36
... sulphuret of lead , and has always been considered of a very refractory nature . The 22 tons worked by your ... sulphurets from Monroe mine , very closely concentrated , and which had been previously worked by battery and pan ...
... sulphuret of lead , and has always been considered of a very refractory nature . The 22 tons worked by your ... sulphurets from Monroe mine , very closely concentrated , and which had been previously worked by battery and pan ...
الصفحة 39
... sulphurets in the cylinder , another point of great impor- tance . When the ore contains a large proportion of sulphurets , the heated air may be passed over it by means of the blower and pipe and they may become more completely ...
... sulphurets in the cylinder , another point of great impor- tance . When the ore contains a large proportion of sulphurets , the heated air may be passed over it by means of the blower and pipe and they may become more completely ...
طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
50 feet amalgam amount antimony arrastra assay average Bannack base bullion bed-rock bullion Calaveras County California Cañon carbonate cent chemical claim coal commenced company's contains copper cost County course Creek Cupellation December deposits depth developed district ditch drift drill east El Dorado County engine erected Eureka expense extracted feet deep feet in length feet long feet wide furnace galena gangue gold Gold Hill gravel ground Gulch Hill hundred hydraulic inches incline iron labor lead ledge limestone located lode metallurgy metals miles mill miners Mining Company months nearly Nevada opened operations ounces owners placer mines pounds present Professor prospecting quantity quartz quartzite rich River rock San Francisco silver slag slate smelting smelting-works stamps stopes sulphurets sunk supply surface Table Mountain tailings thick tion tons Total tunnel Tuolumne County tuyeres Valley vein width yield