232 



ORIENTAL PLAGUE 



CHAP. 



V. — Experiments in Testing Blood of Prepared 

 Animals for the Presence of Germicidal 

 Substance. 



(a) Guinea-pigs. — With reference to the guinea-pig 

 of experiment 1, guinea-pig No. 1, referred to at page 212, 

 it will be convenient here to restate, in tabular form, the 

 several occasions on which this animal had been injected, 

 and the material used for injection in each instance : — 



Test in corpore of the blood of this animal was 

 performed as follows : — Blood serum of the animal was 

 mixed with living plague emulsion, and the mixture 

 injected subcutaneously into the groin of a guinea-pig, a 

 like amount of living plague emulsion being at the same 

 time injected into a control guinea-pig. The two animals 

 were of about the same body-weight. Thus : — 



(1) July 16. — Guinea-pig No. 11 was injected with 

 100 cubic millimetres, 1000 cubic millimetres being equal 

 to 1 cubic centimetre, of plague emulsion, plus 25-30 



