The content is available as a PDF (11.4 MB).
. 1875 Dec;29(12).
Advertisements
This work is free of known copyright restrictions. For more information, please see PMC Back Issue Digitization.
PMCID: PMC6894734
. 1875 Dec;29(12).
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.