consequent upon Inflammations of acute local Character. 165 



1. Finely granular leucocytes. 



2. Coarsely granular leucocytes. 



3. Hyaline leucocytes : . Large. 



/3. Small. 



Differences "between CaPs Blood and Dog's Blood. 



The number of chromocytes per unit volume blood is greate** in 

 vt's blood than in dog's blood. The individual chromocytes are 

 smaller in the former ; according to Gulliver,* the average diameter 

 cat is 1/4404 in. ; in dog, 1/3542 in. The ratio of leucocytes to 

 iromocytes in normal cat's blood is distinctly lower than in dog's 

 ilood ; this is probably a result of the greater number of the smaller 

 iromocytes per unit volume of cat's blood. 



In the blood of nearly one half of the dogs I have examined, a 



few nucleated chromocytes have been met with. It has been so in 



jme instances with old dogs (in half-grown puppies they are found in 



lumbers) ; in all instances the dogs were not known to be ailing ; 



)me were certainly very active and well-nourished. The nucleated 



iromocytes were always of the kind called normoblasts, In- adult 



its the blood seems to contain nucleated chromocytes less commonly, 



3ut I have met with them. 



The specific gravity of the serum of cat's blood has in my experi- 

 lents averaged distinctly higher than that of dog's blood. 

 The coarsely granular leucooyte appears rather more numerous in 

 it's blood than in dog's. Certain differences between the coarsely 

 lular leucocytes in the two species will be mentioned in a short 

 Jescription of the leucocytes (p. 189.) 



(1.) The Seat of Acute Local Inflammation is in the Limb. 



The inflammation was induced in the extremity of the limb in the 

 ray above described. 



The results on the blood will be best shown by quoting some 

 camples. 



Example. 



10.30 A.M. Temperature; 38'8. Eespiration, 20. 



Sp. gr. of blood from artery in ear 1'065 



Haemoglobin value 72 



Sp. gr. of blood serum 1'025 



Number of ehromocytes per mm. blood 6,553,332 



leucocytes per mm. blood G,603 



,, hyaline leucocytes per mm. blood 302 



.. coarsely granular leucocytes per mm. blood 435 



irregularly nucleate leucocytes per mm. blood 6,281 



1 'Proceedings of the Zoological Society of London," June 15, 187i5 

 VCL LV. N 



