| Abstract: |
Electroscope (?). Triangular glass vessel formed of three vertical glass plates, all cemented (?) together at edges, and closed with triangular brass cover carrying two brass terminals, one central on screw with milled edge and the other near a corner of the cover with insulated collar. The lower side of the brass is heavily coated with wax. It is not clear how the second terminal is insulated, as it screws into the brass cover. |