The method described in this paper for the measurement of blood volume in rats is very similar to that used by H. P. Smith in his blood volume determinations on dogs.
Proceedings of the Iowa Academy of Science
©1933 Iowa Academy of Science, Inc.
Hill, Robert T.
"Blood Volume in Single and Parabiotic Rats,"
Proceedings of the Iowa Academy of Science, 40(1), 236-238.
Available at: https://scholarworks.uni.edu/pias/vol40/iss1/137