Important: Safety Warning
This page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
This information has been left in for historical purposes but should not be acted upon.
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Improved Electropoion Fluid
Add one part (by volume) of sulphuric acid to 10 parts of water. Of 10 pounds (or pints) of the dilute acid, add from 1 to 2 pounds of chromic acid, according to the strength of current desired. Where constant action over a long time is desired, rather than maximum energy, omit part or all of the sulphuric acid.
Bichromate of potash is no longer used for batteries by intelligent workers. It owes its virtues to a small amount of chromic acid which can be obtained from it by reaction. Pure chromic acid is cheaper for the same work, and is free from many of the difficulties attendant on the use of the bichromate.