In the classroom, students gathered around a large table, are going through the various stages of making tooth powder.
Copyright:
Literary rights to the unpublished material have been dedicated to the public. (More information)
The National Library of Medicine believes this item to be in the public domain. (More information)
Related Title(s):
Is part of: Archives, 1894-1952, box 1.; See related catalog record: 2934107R
