author
John Berry Haycraft
1857–1922
A pioneering British physiologist, he helped turn careful laboratory work into discoveries that would matter far beyond his own time. He is especially remembered for early research on blood coagulation and for identifying hirudin in leech secretions.
1 Audiobook
Darwinism and Race Progress
by John Berry Haycraft
About the author
Born in Lewes, Sussex, John Berry Haycraft was a British physician and physiologist who studied medicine in Edinburgh and later worked in the laboratory of Carl Ludwig in Leipzig. He went on to hold academic posts in physiology, including work in Birmingham and later at University College of South Wales and Monmouthshire in Cardiff.
Haycraft is best known for his 1884 research showing that medicinal leeches produce a powerful anticoagulant, later known as hirudin. That finding became an important landmark in the study of blood clotting, and it helped secure his place in medical history.
He was elected a Fellow of the Royal Society of Edinburgh, and contemporaries remembered him as a notable figure among British physiologists. Although not widely read outside specialist circles today, his work sits near the beginning of a line of research that would grow into modern understanding of anticoagulants and circulation.