The quicksilver resources of California . nser at the end walls, water circulat-ing through the installa-tion, called waterbacks.[See vol. XIV, page 216.]At the Karl mine, SanLuis Obispo County,8-inch tile pipes, throughwhich water circulates,have been placed in thefirst four condensers. At the New Idria mine,stone is used for theconstruction of some con-densers. The iron condensers atpresent used are generallyof the Knox type. [SeeFig. 90, and Egleston,above cited, page 846.]Where the ore does notcarry too much iron sulphide, they stand very well. At the Manhattan mine, onthe coarse-ore furna
The quicksilver resources of California . nser at the end walls, water circulat-ing through the installa-tion, called waterbacks.[See vol. XIV, page 216.]At the Karl mine, SanLuis Obispo County,8-inch tile pipes, throughwhich water circulates,have been placed in thefirst four condensers. At the New Idria mine,stone is used for theconstruction of some con-densers. The iron condensers atpresent used are generallyof the Knox type. [SeeFig. 90, and Egleston,above cited, page 846.]Where the ore does notcarry too much iron sulphide, they stand very well. At the Manhattan mine, onthe coarse-ore furnace, seven iron condensers were installedbehind two brick-dust chambers. These have been used from1874 to 1877 and from 1885 to 1887 continuously, and from1889 to the present date about two months every year. Alljoints are luted with Portland cement. Another iron condenser, the water tank condenser [seeFig. 91], is used at New Almaden for furnaces Nos. 7, 8, and 9.[See Egleston, page 860.] These condensers give very goodsatisfaction. ^Jte. The Baker Flue. 252 QUICKSILVER RESOURCES OF CALIFORNIA. The farther the parts of the condensing plant are from thefurnace, the more they are exposed to the deteriorating effectsof waters carr^dng sulphuric acid, and experience has taughtthat wood is the onlj- material which will resist the eSects to agreat extent, especially pitch pine, hence the use of woodenconstructions in those parts of the plants which are not exposedto too high temperature. At New Almaden the wooden Baker &
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