CARRIAGE OF DISEASE 
159 
from a neighboring dust-bin or manure heap, or from 
the liquid stools of a diarrheal patient in a neighboring 
house. Flies have to be picked out of the half-empty 
can of condensed milk before its remaining contents 
can be used for the next meal.’ Newsholme considers 
the greater prevalence of diarrhea among infants fed 
on Nestle's milk as due to the fact that flies are more 
attracted to it than to ordinary cow’s milk because of 
its sweetness. 
“Copeman (1906, p. 18), in a report to the Local 
Government Board dealing with epidemic prevalence of 
infantile diarrhea at Wigan, says: ‘At the Miry Lane 
Depot there is always stored (awaiting removal by 
farmers) an enormous amount of night-soil mixed with 
ashes which, in hot weather especially, is not only ex¬ 
ceedingly offensive, but is beset by myriads of house 
flies. As the result of personal enquiry at the various 
houses in the neighborhood in which, during the year 
1905, deaths from diarrhea had occurred, I learnt that 
considerable nuisance from the foul odors was apt to 
be experienced during the prevalence of hot weather, 
especially with the wind in the south or southwest, i. e., 
blowing from the Depot to the special area, so much 
so on occasions as to render it necessary to shut all the 
windows, while the inhabitants of houses nearest the 
Corporation Depot stated that at certain times of the 
year their rooms were apt to be invaded by a veritable 
plague of flies, which swarmed over everything of an 
edible nature on the premises. This being so, it would 
appear not improbable that these flies, some of which 
