Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
The cell : outlines of general anatomy and physiology / by Dr. Oscar Hertwig ; translated by M. Campbell ; edited by Henry Johnstone Campbell. Public Domain Mark. Source: Wellcome Collection.
Provider
This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.