Improvements in self-acting combined spittons and wash bowls or the like principally for dental purposes / [Lester Fred Lerchner].

Public Domain Mark

You can use this work for any purpose without restriction under copyright law. Read more about this licence.

Credit

Improvements in self-acting combined spittons and wash bowls or the like principally for dental purposes / [Lester Fred Lerchner]. Public Domain Mark. Source: Wellcome Collection.