Apr. 30, 1917 
Morphology of Normal Pigs' Blood 
*39 
25 young pigs and 6,176,272 in the older hogs. The leucocytic count was 
also lower in the young animals, averaging 12,328 in the young and 
18,533 in the older animals. 
Burnett 1 states that the lymphocytes in young animals are generally 
present in greater numbers than in adults. He states that in puppies 
3 to 20 days old they were 20.8 to 30.7 per cent, while for adults they 
average 19.4 per cent. We have found a similar condition in the pig. 
In young pigs the lymphocytes average 62.25 per cent and in adults 
55.21 per cent. The large mononuclears are also present in greater 
numbers in the young animals, 2.63 per cent being found in young ani¬ 
mals and 0.75 per cent in older animals. The polymorphs, eosinophiles, 
and mast cells are present in greater numbers in adults. These cells 
show a percentage of the polymorphs of 39.79 in older animals and 32.13 
in young animals; of the eosinophiles, 3.42 in the old animals and 1.28 
in the young; of the mast cells, 0.79 in old animals and 0.24 in the young. 
Giltner 2 found a higher percentage of hemoglobin in the older animals, 
88 in the older and 85 in the younger. 
Our results also show a higher percentage of hemoglobin in the older 
animals. The older animals averaged 79 per cent, as compared with 66 
per cent in the younger animals. 
We also found a higher specific gravity in the case of the older pigs, 
and the clotting time was about 6 seconds shorter in these older animals. 
Differences of SEX. —Burnett 3 states that the number of red cor¬ 
puscles and the amount of hemoglobin seem to be higher in male than 
female domestic animals. 
Giltner’s results show about the same number of red corpuscles in the 
blood for females and males. They average 7,945,000 for the males and 
7*895,500 for the females. He found the leucocytes to be a little higher 
in the male. These cells average 18,150 in the male and 16,415 in the 
female. Giltner found the percentage of hemoglobin to be about equal 
in the two sexes, 87 in the male and 88 in the female. 
Our results show the number of erythrocytes to be about equal in 
both groups (young and old). In young pigs the average number of 
red corpuscles was 3,953,071 in the males, and 3,718,400 in the females. 
In the older pigs the average number of red corpuscles was 6,068,250 in 
the males, and 6,284,294 in the females. We found a higher leucocytic 
count in the males than females. The young males showed an average 
white-cell count of 12,857, as compared with 11,800 in the females. 
The older males showed an average white-cell count of 19,125, as com¬ 
pared with 17,941 in the females. 
We found a higher percentage of hemoglobin in the male animals of 
both groups. In the case of the young animals the males showed 60 
per cent, as compared with 52.5 percent in the female. The older males 
1 Burnett, S. H. Op. cit. 
2 Giltner, Ward. Op. cit. * Burnett, S. H. Op. cit., p. 58. 
