C 384 ] 
Received May 7, 1770. 
XXXIII. On the Degree of Heat which co- 
agulates the Ly?nph , and the Seru?n of the 
Blood ; with an Enquiry into the Caufes 
of the inflammatory Cruft, or Size, as it is 
called : By the fame. 
Read Nov. 
1770. 
l S’"T N the preceding paper, befides men- 
JL tioning fome circumftances which pro- 
mote the reparation of the blood, and which af- 
fe<ft its colour, I have enquired into the caufes to 
which its coagulation when taken from the veins is 
owing, and the manner in which it coagulates when 
at reft in the body. I fhall now proceed to lay be- 
fore this learned Society, an account of fome other 
experiments which I have made upon this fluid. 
Befides being coagulated when expofed to the air, 
the coagulable lymph, as well as the ferum , is known 
to be fixed by heat j but the degree of heat has not, 
I think, been determined. It has been fuppofed to 
require a degree of heat almoft equal to that which 
coagulates the ferum * ; but a much lefs is necefiary, 
as will appear from the following experiments. 
* Vide Traite du Cceur. T. ii. p. 93. Schwenk, Haemato- 
Iog. p. 13a- 
Ex- 
