Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
The history of the tread-mill : containing an account of its origin, construction, operation, effects as it respects the health and morals of the convicts, with their treatment and diet. Also, a general view of the penitentiary system, with alterations necessary to be introduced into our criminal code, for its improvement / by James Hardie, A.M. 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.)