Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1480
uffers. Pour the bottle of oil over the top of solution andplacecover on. If buying oil by bulk, get a heavy paraffin oil whichwill read 1.46 specific gravity or 48° Baume and pour a l^inch layer on each celJ- 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…
