542 



Mr. E. C. Hort. 



[June 2, 



Viscosity Curve showing Antitryptic Power of Serum after Injection of Water. All four 

 serums at same point six minutes after commencement of digestion. 

 /55 1 1 1 1 1 1 1 1 1 1 1 



ISO I 1 1 1 1 1 1 1 1 1 



O 15 30 ^5 60 75 90 105 120 /35 150 



Minutes 



The validity of these last figures rests on demonstration that the serums 

 of healthy animals of the same species give closely parallel antitryptic values. 

 This I have been able to show in the case of the horse, rabbit, and guinea- 

 pig, by inimerous observations as yet unpublished. This has already 

 been shown for man.'* The serums of two healthy guinea-pigs, taken at 

 random, gave the following readings. .The estimations were done in 

 duplicate. Temperature, 1.0° C. throughout. Quantities as before : — 



1 



