Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
The means by which the temperature of the body is maintained in health and disease : being the Croonian lectures delivered before the Royal College of Physicians of London on June 15th, 17th, 24th, and 29th, 1897 / by W. Hale White. Public Domain Mark. Source: Wellcome Collection.