Excerpt from Medical Art and Indianapolis Medical Journal, 1898 Positive Working: The metal plunger screws into the rubber plug, adjusting pressure and making a

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced