Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1474
uffers. Pour the bottle of oil over the top of solution andplace cover on. If buying oil by bulk, get a heavy paraffin oil whichwill read 1.46 specific gravity or 48° Baume and pour a ^4inch layer on each cell Primary Batteries 1445 These are good cells^ but any sulphuric acid or causticpotash cell… … Fig. 691edison-lalande cell Dry Batteries.—A dry battery is one which has its elec-trolyte disseminated through some solid material throughwhich it can diffuse itself. Plaster of Paris and gelatinouscompounds have been used for the solid part. The usualconstruction is on the basis of the plaster of…
