Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
Diseases of the heart / By John Cowan with chapters on the electro-cardiograph, by W.T. Ritchie and the ocular manifestations in arterio-sclerosis, by Arthur J. Ballantyne. Public Domain Mark. Source: Wellcome Collection.
Provider
This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.