146 VACCINE BIOPLASTS, 



Such living germs may pass from the organism on 

 which they grew to another, and will grow and 

 multiply there if they meet with the proper pabulum. 

 The only condition in which matter is known to ex- 

 hibit these powers of self-multiplication is the living 

 state. 



M. Chauveau (Comptes rendus, February, 1868) 

 described these same bodies in 1868. It is evident he 

 had not seen my observations, published in the Cattle 

 Plague Report, or my previous researches published 

 in the Microscopical Transactions for 1863.* Fig. 61, 

 plate XVII, was appended to this paper, which was 

 read December gih, 1863. Chauveau showed that the 

 active particles subsided after forty-eight hours, and 

 that no effects were produced by inoculating the 

 albuminous supernatant fluid, while the full effects 

 were produced by vaccinating with the deposit. As 

 would be supposed from the excessive minuteness of 

 these bodies, they are not to be separated by ordinary 

 filtration, but if the fluid containing them also con- 

 tains a trace of coagulable fibrin diffused through it, 

 this by contraction after coagulation would filter off 

 the little bioplasts, and leave a serum perfectly free. 

 Dr. Farr calls the living particles biads ((Sia, force, 

 fiio?, life), and speaks of the vaccine particles as 



* "Beale had, before Chauveau, declared that the 'active properties 

 of vaccine lymph are entirely and solely due ' to these corpuscles. He 

 has figured them." Dr. Farr, "Report on the Cholera Epidemic of 

 1866," p. Ixviii. 



