and engineering journal . , it may be used fora variety of technical calculations,in which its use effects an enor-mous saving < f time. Thus, theengineer may compute the strengthof beams, moments of power of engines, hydraulicformulae, areas of circles andellipses. cubic contents. weight*,conversion of British into metricand other systems of measurement,without putting down a singleintermediate quantity. The elec-trical engineer may solve all prob-lems involving the application ofOhms law of (he relation betweencurrent, electro motive force, andresistance. The surve
and engineering journal . , it may be used fora variety of technical calculations,in which its use effects an enor-mous saving < f time. Thus, theengineer may compute the strengthof beams, moments of power of engines, hydraulicformulae, areas of circles andellipses. cubic contents. weight*,conversion of British into metricand other systems of measurement,without putting down a singleintermediate quantity. The elec-trical engineer may solve all prob-lems involving the application ofOhms law of (he relation betweencurrent, electro motive force, andresistance. The surveyor may plotsurveys by rectangular co ordinatesand set out curves. This Davis made 10 inch SlideRule can be supplied from stock. Sola Aconts ffr South Afric* : BARTLE & CO. LTD., Loved»y House. Box J4M. Phone SSM. JOHANKXSBUBO. And at »nd DURBAN. MEANS HIGHEST GRADE 658 THE MINING AND ENGINEERING JOURNAL. Jburg, January 7, 1922. THIS IS A SULLIVAN LOW VEIN COAL CUTTER ANDPOWER CAR WITH TRAILER-TYPE ~r%v-. , ??»::::J rv^£W^-i*J^&. ^n^gfle V •!??•• ?^• ; ;i -?arr- . ofc i AND THIS IS THE IRONCLAD SHORTWALL COAL CUTTER
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Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjectmineralindustries
