the same ward. This fact tits in very well with the assumption that a direct infec- 
tion occurs from one jtersoii to another, and is evidence similar to that brought 
forward by Yenuti (see ]>. 55). 
AIS^ALYSIS OF CASES A]S J) DISCUSSIOX OF SYMPTOMS. 
AGE AND SEX OF INDIVIDUALS AFFECTED. 
In the lOd cases of 7/. at least 60, and probably 70, ot the 
individuals affected were males; 30 Avere females, Avhile in the reports 
of the remaining- 6 cases the sex is not indicated. Sixteen and prob- 
abh^ 18 Avere oati* 20 years of age, 2 at least being over 50; 81 Avere 
younger than 20 years; in 1 cases no reference ifs made to age. 
Between 1 and 5 years there were 9 cases; 5 and 10 years, 21 cases; 
10 and 15 years, 5 cases; 15 and 20 years, 5 cases; 11 other cases Avere 
reported simply as children. 
According to these figures llynienolep 'o^ ncuia is much more common 
among children than among adults, and males are more often infected 
than females. Five to 10 years seems to be the age most frequently 
affected. The veiw large percentages of males and children may be 
due in some degree to the fact that in the more heuAuly infected 
regions investigations have been made more especialh’ among chil- 
dren than among adults, and among males than among’ females. 
GENERAL ENA’IKONAIENT AND SOCIAL FOSITION OF INFECTED 
INDIA'IDUALS. 
With regard to the social position and general enAfironment of the 
individuals affected, it is to be noticed, in the first place, that 32 of the 
cases were in orphan asylums or poorhouses, 27 being in the asAdum 
at Catania, Sicih ; 3 in two asylums at Macon, Ga., and 2 in a poor- 
house at Tok}’o, Japan; and 6 cases Avere in an insane asjdum in the 
District of Columbia. Of the remaining cases,. 6 or 8 inaA" be said to 
belong among the well-to-do classes. Grassi, also (Grass! & Rovelli, 
1892a), as. already stated, refers to an indefinite number of cases AA’hich 
occurred among the children of Avell-to-do families. It is only certain 
that the patients in about 20 of the 62 cases remaining were poor, but 
it is probable, judging from A^arious circumstances related in connec- 
tion Avith individual cases, that the majority Avere from the poorer 
classes. 
The conclusion does not, therefore, seem unjustified that the children 
of the poor are more liable to infection, and children gathered together 
in institutions seem especially likely to shoAv a hea\’3^ percentage of 
infection; the worm, in fact, seems to be particularh" common in 
orphan asAdnms. Among adults, also, institutional life seems to fa a or 
infection (cases Nos. 101 to 106). 
