02 VARIATIONS IN NUMBER OF RED CORPUSCLES 



paralysis a higher count of red corpuscles has been obtained from 

 the paralyzed part of the body. Cold baths, massage, muscular 

 exercise and electricity produce a temporary polycythemia. 

 Polycythemia has been observed after the administration of 

 various drugs, as pilocarpin, eserin, phosphorus, Glauber's salt. 



Age. In general the young have more red corpuscles per cmm. 

 than older animals. Observations made by different investiga- 

 tors are conflicting, in some cases even concerning the same species. 

 The subject needs further study. It seems to be true that the 

 number of red corpuscles is higher in the young of animals that 

 are well developed at the time of birth, while in the young of those 

 animals that at birth are undeveloped, as the dog, cat, sheep, 

 goat and pig, the number is less than it is later. In the fetus the 

 red corpuscles gradually increase till the time of birth. They 

 seem to increase in the undeveloped young for a time after birth. 

 In the aged the number of red corpuscles seems to be lower than 

 in youth and middle age. 



Sussdorf states that the lamb has not less than 13-14 millions. 

 The average for adult sheep is given from 8-12 millions. Storch 

 found the average for adult sheep 10,472,000, while for lambs he 

 found 11,032,000. The same investigator found 7,639,000 in 

 adult horses and 9,340,000 in foals (one year); in adult cattle 

 6,219,000 and 8,523,000 in calves; in rams 11,183,000, in wethers 

 9,839,000, in ewes 9,039,600 and in lambs 1-14 days old 8,833,000, 

 in lambs two months old 13,232,000; in adult goats, 14,569,000 

 and in kids 10,150,000; in adult swine 8,045,000 and in pigs 

 4,923,000. Giitig found an average of 5.2 millions in sucking pigs 

 from 2 to 4 weeks old while there were 5.7 millions in pigs 2 to 

 6 months old. Haycm gives the average for adult cats as 9,900,000 

 per cmm., while for kittens four to eight days old as 5,357,000 per 

 cmm. Burnett and Traum found the average for dogs to be 

 5,967,000 per cmm. and 90% Hb, while puppies from less than a 

 day to 20 days old had from 3,992,000 to 4,134,000 per cmm. and 

 Hb percentage varying from 73 to 89. Storch found 4,264,000 

 red corpuscles in a cow about 15 years old, and 3,720,000 in a 

 cow about 18 years old. 



Sex. The number of red corpuscles and the amount of hemo- 

 globin seem to be higher in males than in females. Otto found an 

 average of 6,123,700 red corpuscles and 14.08 grams of hemoglobin 



