February 23, 1875: Beit known that I, J AMEs CHAPMAN BRYAN, of the city of Philadelphia, State ot' Pennsylvania, have invented new and useful Improvements in Earth-Batteries for electro-magnetic purposes | Poal: Say what you want.

Welcome • User Guide
ToS • Privacy • Canary
Donate • Bugs • License

©2025 Poal.co

136

•

February 23, 1875: Beit known that I, J AMEs CHAPMAN BRYAN, of the city of Philadelphia, State ot' Pennsylvania, have invented new and useful Improvements in Earth-Batteries for electro-magnetic purposes (patents.google.com)

(post is archived)

You are currently inside a comment thread.

Click here to see all the comments (4).

[–] [deleted] • 0 pt

About as useful as a potato battery.

link