76 ILLINOIS ACADEMY OF SCIENCE 
This is especially true in the reduction of infant mortality; 
in. the promotion of industrial hygiene, and in the prevention of 
epidemics. 
If we are ever to have preventive machinery commensurate 
with scientific knowledge ; education of the public and of future 
community leaders must be pushed with greater vigor. The 
relation of preventable disease to social and to economic wel- 
fare requires that no student in our colleges or universities 
should complete his education without a thorough elementary 
knowledge of hygiene and sanitation. 
It is of little importance, for what field the institution is 
preparing the future leader; to be successful he must have 
continued good health. If he studies Spanish and Business 
with the future planned for commercial expansion in Latin 
America, his success may largely be determined by whether he 
is bitten by a mosquito that may give him yellow fever, malaria 
or dengue. If engineering is his profession, the condition is 
the same, whether at Panama or on the Rand, the success of 
his achievement will depend upon his health and that of his 
employees. Should he become an agriculturist, to protect him- 
self, his family and his community, he must meet the problem 
of rural sanitation. Should he select pedagogy as a vocation 
and should not recognize the relation of errors of refraction, 
defects of hearing, under-nutrition, and mental retardation 
to class repetition, he can not attain the community leadership 
that should be his heritage. Should he worship at the shrine 
of Mars, other things being equal, his eminence as a com- 
mander will be in direct proportion to his sympathetic co-oper- 
ation with the sanitarians of his command. Should he seek to 
be a captain of industry, to be able to meet modern competition, 
he must have knowledge of industrial and vocational hygiene. 
In short, there can be no rule of efficiency that does not in- 
clude the gospel of health. 
Finally, if hygienic living is to supersede the fierce struggle 
for existence in a large part of our population; if infant mor- 
tality is to be decreased to a proper level; if rural sanitation is 
to be elaborated; if senility is to be kept beyond forty-five; if 
workers are to engage in industries without injury to health or 
to the reduction of their period of productivity ; if communic- 
able disease is to be prevented; if we are to have more stu- 
