James Blundell’s Gravitator, from “Observations on the Transfusion of Blood, with a Description of his Gravitator.” This image is in the public domain in the United States as its copyright has expired.
BRANCH is an open-access publication 
James Blundell’s Gravitator, from “Observations on the Transfusion of Blood, with a Description of his Gravitator.” This image is in the public domain in the United States as its copyright has expired.
BRANCH is an open-access publication