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An illustration of the bottle bichromate.

Bottle Bichromate

An illustration of the bottle bichromate.

The cell was set up in a glass, or glazed earthenware, pot. This contained the chromic acid solution, the carbon plate and a porous pot. Inside the porous pot was dilute sulfuric acid, the zinc rod, and a small quantity of mercury. The mercury formed an amalgam with the zinc and this reduced "local action", i.e. unwanted dissolution of the zinc when the cell was not in use.

Fuller Bichromate

The cell was set up in a glass, or glazed earthenware, pot. This contained the chromic acid solution,…

An illustration of the Trouve bichromate.

Trouve Bichromate

An illustration of the Trouve bichromate.

"Partz acid gravity cell. In this form of cell, the electrolyte which surrounds the zinc is either magnesium sulphate or common salt. the depolarizer is a bichromate silution which surounds the perforated carbon plate located in the bottom of the jar. A vertical carbon rod fits snugly into the tapered hole in the carbon plate, and extends through the cover forming the positive pole." -Hawkins, 1917

Partz Cell

"Partz acid gravity cell. In this form of cell, the electrolyte which surrounds the zinc is either magnesium…