Journal of the Society of Arts, 2 tomasSociety of Arts, 1854 |
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18 psl.
... gossan from Devonshire yielded , Russian ores is lost - by confession of the mining Ibs . grs . Oct. 20. - 362 yielded 154 at the rate per ton " " وو Oz . dwts . grs . 1 19 17 3 2 20 2 0 98 66 25. - 320 " 138 " 75 31 1 18 6 14 Nov. 7 ...
... gossan from Devonshire yielded , Russian ores is lost - by confession of the mining Ibs . grs . Oct. 20. - 362 yielded 154 at the rate per ton " " وو Oz . dwts . grs . 1 19 17 3 2 20 2 0 98 66 25. - 320 " 138 " 75 31 1 18 6 14 Nov. 7 ...
21 psl.
... gossan , from which they expected to obtain gold at an expense not exceeding 10s . per ton . They had tested the machines at Mr. Berdan's , in the presence of Mr. John Wilson , of the firm of Rawlings and Watson , when the brown gossan ...
... gossan , from which they expected to obtain gold at an expense not exceeding 10s . per ton . They had tested the machines at Mr. Berdan's , in the presence of Mr. John Wilson , of the firm of Rawlings and Watson , when the brown gossan ...
22 psl.
... gossan . Gossan was decomposed rock , and of course might be reduced at a very small cost . They might , however - so uncertain wasit - take up one portion , one - fifth of which should be gold , whilst the next and immediately ...
... gossan . Gossan was decomposed rock , and of course might be reduced at a very small cost . They might , however - so uncertain wasit - take up one portion , one - fifth of which should be gold , whilst the next and immediately ...
55 psl.
... gossan of the copper lodes at Poltimore , North Devon , was submitted to be crushed ; one half , as before , in each basin . This ore was much less hard than the Californian , and was partly in small lumps , partly in a red , soft ...
... gossan of the copper lodes at Poltimore , North Devon , was submitted to be crushed ; one half , as before , in each basin . This ore was much less hard than the Californian , and was partly in small lumps , partly in a red , soft ...
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