[instrument_box acc_num=2010.med.2 float=left]
This medical device supplied ‘Galvanic’ (direct) current from a dry-cell battery. It was a low-end product for use in the home. The purchaser received 90-page booklet with instructions for treating one hundred diseases.
The large number of surviving examples suggests that this item was quite popular among self-treating patients at this time.
c. 1890