A circular to agents
Subtitle: quick sales and enormous profits : agents wanted in every part of the United States and Canada to sell Boyd's miniature galvanic battery
Publisher: [s.n.
Published: 1879
Place of publication: Montreal
Language: eng
Format: [broadside]
Subjects: Electrotherapeutics; Electric batteries; Medical instruments and apparatus; Electricity in medicine; Instruments
Notes: Signed: H.H. Menager, 117 St. Francois Xavier St., Montreal, Canada.

Battery dated: 1879.

Printed on green paper.