Glass Insulators Keep Insects from Refrigerator - July 1919

By Bill Meier; posted May 4, 2022

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From Popular Mechanics Magazine - July 1919

Note the description. They are used just like battery rests where they fill the area between the skirt and the pin with liquid.

[id: 651680300; Original] found by Eric Halkyard; this is a larger example.

656280231