60 
By referring to Table 2 it is seen that not only is there this great 
difference in the frequency of infections between the various buildings 
and sections, but that the wards as well in any one section show a 
wide range in the amount of infection which they present. It must 
be borne in mind, however, that in considering the patients by wards 
we are working upon small bases and that the presence or absence of 
but one or two infections may make a large difference in the rate 
per cent. In section 1, for instance, 5 of the 8 wards show no infections, 
and the three infected wards present 2.86, 4.44, and 14.29 infections 
per 100, respectively, yet the comparatively high rate of 14.29 per 100 
represents but 2 infections. 
Xevertheless, it can not be considered without significance that, 
as occurs in section 5, one ward of 44 patients should give only 3 
infections (6.82 per 100) and another ward of 45 patients 17 infections 
(37.77 per 100) or, as in section 3, that a ward of 25 patients should 
have no infections while a contiguous ward of 26 patients has 6 infec- 
tions (23.08 per 100). 
In sections 6 and 7, all the wards show a high rate of infection, but 
here also there is a difference of over 35 per 100 in the former section 
and over 20 infections per 100 in the latter, between the wards giving 
the lowest and highest rates of infection. 
It is evident, therefore, that there is an actual and not insignificant 
difference in the degree of prevalence of intestinal worms both in the 
various buildings, sections of a building, and wards of a section, a 
difference which seems too large and too striking to be wholly explained 
by any chance distribution of intestinal worms in the institution. 
We have made every endeavor to discover an explanation of these 
conditions, which might have an important influence upon the results 
of our work. In these endeavors we have been in only a small meas- 
ure successful. 
The great number of infections foimd among the specimens col- 
lected from certain wards led to the suspicion that the stools were 
contaminated or confused during their collection. Such contami- 
nation was rendered very improbable by the fact that the number of 
eggs present in the specimens collected on the- same day from different 
patients varied greatly; further, the possibility of contamination was 
later excluded by personally collecting and reexamining specimens 
from these wards. 
The only parasites which present infections in sufficient numbers 
to be considered separately in this connection are the whipworm and 
pinworm. 
Of the 26 infections with Oxyuris foimd among the 1,010 Connecti- 
cut cases, 18 appeared in one section (section 5) of 204 men, the other 
8 infections being distributed among 4 other sections. Furthermore 
11 of the 18 infections in section 5 occurred among the 45 men on ward 
