512 Veterinary Medicine. 



Rabbit, 6.845.000 (Cohnstein and Zantz), 7.107.000 (I/Owit). 



Guineapig, 3.600,000 (Malassez), 5.859.000 (Hayem). 



Hen, 2.400.000 (Hayem), 3.100.00 (Malassez). 



Swan, 2.189.000 (Hayem). 



Ostrich, 1.620.300 (Hayem). 



Variation in Number. Physiological variations in numbers- 

 are to be taken into account in making deductions from counts 

 of the red globules. The count is made of the number of 

 globules relative to the other blood constituents and thus a 

 variation of the entire quantity of blood in the body, by the 

 encrease or decrease of the water, will make a marked rela- 

 tive decrease or encrease of globules in the specimen examined. 

 This does not by any means indicate that there are more or 

 less' red globules in the blood as a whole. Digestion. From 

 )4 to 1 hour after a meal, the blood globules decrease in a speci- 

 men because of the absorption of nutritive liquids from the 

 alimentary canal and consequent dilution of the blood. After 

 2 to 4 hours they again encrease until after the next meal is 

 taken. Prolonged fasting causes a marked relative encrease. 

 After 24 hours fasting a dog shows 400.000 to 500.000 per 

 c.mm. encrease. Emaciation. Similarly, when emaciated from 

 starvation, the red cells were found to continue relatively above 

 normal. 



Profuse secretion of liquid. This decreases the water in the 

 blood and not the globules, which become relatively more 

 abundant in any specimen examined (polycythemia). Profuse 

 perspiration from violent exertion, or in disease, has a very 

 marked effect. Still more marked are profuse diarrhcea and 

 dysentery, and inferentially polyuria. Rinderpest, intestinal cocci- 

 diosis, dropsies, hydrothorax, ascites, and lung plague. 



Repeated small hcemorrhages, rob the system of red globules- 

 and reduce the power of reproducing them. With the resulting 

 anaemia there is a relative reduction in the number of red cells. 



The same applies to wasting diseases generally. Advanced 

 tuberculosis, chronic extensive suppurations, acute streptococcus- 

 suppurations, septicaemias, generalized cancer, chronic diseases- 

 of the alimentary tract associated with great loss of health and 

 vigor, mean marked anaemia and hypocythemia. A bad case of 

 fistulous withers and poll evil showed but 2.634.000 (Moore,, 

 Haring, Cady). 



