30 Society for Experimental Biology and Medicine. 



ations were made on one of the controls and on one of the tubes 

 inoculated with each kind of bacteria mentioned. Cultures at this 

 time showed the presence of great numbers of the species used, 

 with no admixture of other species. The remaining tubes were left 

 in the incubator for several months, when cultures proved to be 

 sterile. The results of physico-chemical examination of these 

 sera are tabulated below : 



Horse Serum A. 



Sterile Controls. Inoculated 



with Staphylococcus. 



1903 °C °C 



May 19 A^o.580; K = o.oo9394 A = °-5 8 5 5 K = 0.009370 



May 26 A,= °-58o; K = o.oo949i {\ =0.585 ; K = 0.009674 



1904 



Jan. 16 ^ = 0.590; 1^ = 0.009684 ^ = 0.640; K = 0.010128 



Horse Serum B. 



Sterile Controls. Inoculated 



with Staphylococcus 



1903 °C °C 



May 21 A= °-5 6 °; K = 0.0095 16 



May 28 = 0.560; K = 0.009516 ^ = 0.580 



1904 



Jan. 15 /\ =0.600; K = 0.009897 /\ = 0.640; K = 0.010372 



These data show but slight changes in the molecular concen- 

 tration of the sera, and such changes as had occurred occasioned 

 an increase in the electrical conductivity as well as in the depres- 

 sion of the freezing-point, showing that dissociable bodies had 

 been produced. The experiments, therefore, failed to explain the 

 high molecular concentration of the serous fluid from the chest, 

 but it is possible that further investigation in this direction will 

 be more successful. 



29. " An experimental study of the eosinophile cells during 

 infection with an animal parasite — Trichina spiralis"; 

 EUGENE L. OPIE. [Presented by JAMES EWING.] 



The administration of Trichina spiralis to the guineapig causes 

 an increase of the eosinophile leukocytes in the blood, comparable 

 to that which accompanies human infection. There is no con- 

 stant alteration of the number of these cells until the end of the 

 second week after infection, when the relative and absolute num- 

 ber rapidly increases and reaches a maximum at the end of the 



