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 1478
lectropoin. This is composed of 4 ozs. of bichromate of soda, ll^pints of boiling water, mixed and cooled; then while slowly Primary Batteries 1443 stirring add little by little 3 ozs. sulphuric acid taken outof a carbon (not diluted). Never pour ivater into acid. The bichromate of soda has so much… … Sim- FiG. 690 OXIDE PLATE OF EDISON-LALANDE CELL and then mercury placed in bottom and zinc set in.ply take out old cup and insert new one in its place. The old zinc should be cleaned, porous cup washed andthen boiled in water and both placed in stock. These cells should be left on open circuit…
