negative electrode of a gravity cell
Date: 1910-1940
Inventory Number: 1997-1-0457
Classification: Battery
Subject:
Maker: American
Maker: Central Scientific Company ? (1889 - 2000)
Cultural Region:
Dimensions:
10.5 x 13.5 x 14 cm (4 1/8 x 5 5/16 x 5 1/2 in.)
Material:
Description:
So-called "Crowfoot". A very heavy metallic piece, most likely heavy cast-zinc, somewhat eroded, with several finger-like branches. It was the negative electrode of a battery and would hang from the top of the battery vessel.
Signedunsigned
FunctionThis was the negative electrode of a battery. It would be immersed in a solution and be connected to a circuit during use. The many branches are a way to maximize the exposed surface area. It would degrade over time and was replaceable. This one is fairly unused. Gravity cells were mostly used for telegraphy.
Curatorial RemarksThe Cenco catalogue of circa 1929 (and others later) mentions such a Crowfoot zinc used with a gravity cell.