and engineering journal . Slide No. 2. J^ Johaniifsliurg, April 24, 1915. THE SOUTH AFRICAN MINING 13, tlic number of hours run shows clearly if the work <lono was donecHiciently. It also points to any inefficifnt use of water, and whethertlio mixture of 1 to 13 is well maintained. In this way, a clear con-ception of the operation is obtained, through the use of electricalapparatus. Hero one may point out to one of the advantages ofele<-trical working wlxM-e electrical meaburomcnts gi\o feuch usefulinformation. (ompariM)M can also bo made as to the eflici<-ncy ofd
and engineering journal . Slide No. 2. J^ Johaniifsliurg, April 24, 1915. THE SOUTH AFRICAN MINING 13, tlic number of hours run shows clearly if the work <lono was donecHiciently. It also points to any inefficifnt use of water, and whethertlio mixture of 1 to 13 is well maintained. In this way, a clear con-ception of the operation is obtained, through the use of electricalapparatus. Hero one may point out to one of the advantages ofele<-trical working wlxM-e electrical meaburomcnts gi\o feuch usefulinformation. (ompariM)M can also bo made as to the eflici<-ncy ofdifferent workmen in this t\pc of work, which is of dcfinit* Use to thosem control: — lifting 30 feet as against the three Sin. gravel pumps lifting 40 feet onthe actual years running, works out as follows: Hydraulic elevator,152 per cent. Average of three gravel pumps, 243 per cent, (theefficiency basis being equivalent to the total foot of and solidslifted to the required height divided by the ; ]!-. ,. n-niTied eitherin water or electrical units to do the \\or, ; lin? billowing 35per c
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Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjectmineralindustries
