40 
over fifteen years' residence in the hospital. The Connecticut women 
enter the hospital with S.70 per cent of Trichuris infections : among 
those of from one to three wears' residence the rate falls sliehtlvto 7.75 
per cent : thereafter there is a comparatively rapid rise tmtil it reaches 
its maximum of 34.69 per cent among the patients of longest institu- 
tional life. 
Notwithstanding the above inconsistencies in the variations in the 
percentage of infection in the different classes of patients among the 
groups of varying lengths of hospital life, the figures in the table do. 
we think, bring out the general tendencies above noted : these tenden- 
cies are more clearly apparent when we compare directly the rate of 
infection among the patients admitted to the hospital within one year 
prior to examination with that among the patients who had lived in 
the hospital over fifteen years, taking first those who show a high fre- 
quency of infection upon admission and then those who enter the 
hospital with a comparatively low frequency, as follows: 
Comparatively high rate of infection on admission. 
St. Elizabeth white males: Percent. 
Less than one year's residence 12. 72 
More than fifteen years 7 residence 4. 26 
St. Elizabeth male negroes: 
Less than one year’s residence ^ 13. 79 
More than fifteen years 7 residence 5. 88 
Comparatively low rate of infection on admission. 
St. Elizabeth white females. 
Less than one year’s residence 3. 00 
More than fifteen years 7 residence 7. 69 
Connecticut males: 
Less than one year’s residence 3. 23 
More than fifteen years’ residence _ — 5. 26 
Connecticut females: 
Less than one year ’s residence — - 8. 70 
More than fifteen years 7 residence - — 34. 69 
