Silver and Gold: An Account of the Mining and Metallurgical Industries of the United States |
من داخل الكتاب
النتائج 6-10 من 91
الصفحة 56
... feet by following and cleaning the crevices . Throughout its length the limestone bed - rock has been deeply worn by the action of swiftly running water carrying bowl- ders and débris , which have cut and carved it in the most singular ...
... feet by following and cleaning the crevices . Throughout its length the limestone bed - rock has been deeply worn by the action of swiftly running water carrying bowl- ders and débris , which have cut and carved it in the most singular ...
الصفحة 58
... feet , and intend erecting powerful machinery , as there is water- power enough to drive an unlimited number of ... length , and is already traced and tested for 1,900 feet . The company have 3,000 feet of lode . There are many ...
... feet , and intend erecting powerful machinery , as there is water- power enough to drive an unlimited number of ... length , and is already traced and tested for 1,900 feet . The company have 3,000 feet of lode . There are many ...
الصفحة 59
... feet in the Sierras , is unequaled in the productiveness of its orchards and vineyards , both as to the quantity and ... length , from the Phoenix Water Company's reservoir across the ravine of Wood's Creek to a hill above the town . The head ...
... feet in the Sierras , is unequaled in the productiveness of its orchards and vineyards , both as to the quantity and ... length , from the Phoenix Water Company's reservoir across the ravine of Wood's Creek to a hill above the town . The head ...
الصفحة 61
... feet in depth , and have been worked over several times . The present ... length , but several are found on the line of the location . The softer ... feet below the tunnel , or 300 feet in depth from the surface . The mill has ...
... feet in depth , and have been worked over several times . The present ... length , but several are found on the line of the location . The softer ... feet below the tunnel , or 300 feet in depth from the surface . The mill has ...
الصفحة 62
... feet in length , with a vein 10 to 20 inches in width . It is owned by Preston & Co. They have hoisting - works run by a 30 horse - power engine , and a mill of ten stamps and two arrastras , now crushing ten tons per day . The quartz ...
... feet in length , with a vein 10 to 20 inches in width . It is owned by Preston & Co. They have hoisting - works run by a 30 horse - power engine , and a mill of ten stamps and two arrastras , now crushing ten tons per day . The quartz ...
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