The electrolyte is prepared by mixing together the following ingredients in the proportions shown:
Sal Ammoniac. 1 part
Zinc Chloride. 1 part
Plaster of Paris. 3 parts
Flour. 3/4 part
Water. 2 parts
Fig. 58.—The Different Operations involved in Making a Dry Cell.
The above paste is then firmly packed into the zinc shell around the wooden plunger, leaving a space of about 3/4 of an inch at the top. The paste can be poured in very readily when first mixed but sets and hardens after standing a short while.
After it has set, withdraw the wooden plunger, thus leaving a space inside of the dry cell a little larger than the carbon. The carbon is now inserted in this hole and the surrounding space is filled with a mixture composed of: