A description of the vibrator (Engl. pat. 1890. No.4390.) and directions for use / by C.H. Liedbeck.
License information
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
A description of the vibrator (Engl. pat. 1890. No.4390.) and directions for use / by C.H. Liedbeck. Credit: Wellcome Collection. Public Domain Mark