Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
Analyses of the hydrant and well waters of the city of Troy : presented to the board of health for the year ending March 1st, 1858, with report of health officer on the same / by Wm. Elderhorst. Public Domain Mark. Source: Wellcome Collection.
Provider
This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)