(Obernetter's.)
"Place the copper plate in a porcelain tray on the bottom of which rests a brightly burnished copper wire, the negative pole.
"The anode on the positive pole, a bright steel plate, is suspended over the copper plate, and kept in motion while the circuit is closed. A precipitate of steel, resembling silver in appearance, must instantly occur upon the copper plate, any air-bells to be removed. Five minutes is sufficient to deposit a perfect steel coating." Grease the plate after steel facing, to keep off the rust. Formula:
(Obernetter's.)
| Distilled water | 1 litre |
| Chloride of ammonium | 60 grammes |
| Proto sulphate of iron | 30 grammes |
| Iron alum | 30 grammes |
