36 Amemcan Statistical Association. 



The number of individuals who were sick during this 

 period, giving the average of each class, was found to be : — 



Seniors 5.6 men. 



Juniors, 7.0 " 



Sophomores, 10.8 " 



Freshmen, 12.8 " 



showing that health increased during the college course. 



Some items were gathered in a study of ten years, by 

 classes, with reference to sickness, as before mentioned, and 

 the results were as follows : — 



Seniors, averaging 50.0 men, had 6.6 on the sick list. 



Juniors, " 53.2 " " 9.1 '• " "• " 



Sophomores, '' 62.9 " " 12.6 " " " " 



Freshmen, " 64.1 - " 14.9 " " '^ 



And in this same period the average loss of time to each sick 

 man was 11.4 days, and to all the college of 2.1 days. There 

 also were among these men 43 different maladies, of which 



83 per cent were colds and 9 per cent physical accidents and 

 injuries. 



Still later, statistics of 14 years* duration for 3488 students 

 were compiled, and the following law seemed to be deduci- 

 ble : The rate of difference in numbers between freslimen 

 and so})homores was 6 per cent, and the decrease in sickness 

 15 per cent. Between the sophomore and junior classes the 

 numerical difference was 14 per cent, and the decrease in 

 sickness 17 per cent. The falling off in numbers from junior 

 to senior years was 8 per cent, and the sickness decreased 

 to the amount of 30 per cent. 



A study of the viability of the first 39 classes of the college 

 — 1821 to 1860 — on the living condition of these graduates 

 has also been a matter of study. The average viability was 



84 per cent, or 16 per cent mortality in classes, averaging 

 at their graduation 24 years of age. 



Another study during 1874 was (see Table A^ p. 590) — 



