94 
WORLD OF INVISIBLE LIFE 
How are 
these studies 
carried on? 
all over the world are spending their lives in 
studying the countless forms of invisible life 
and the ways in which they behave. Many 
wealthy people have given large sums of money 
to pay the cost of this work in the hospitals and 
universities. The Rockefeller Foundation, in 
this country, has a large laboratory for the study 
of diseases and the germs" that cause them, and 
it pays all the expenses necessary for carrying 
on the work. It is probably the largest labora¬ 
tory of its kind in the world. The Foundation 
also gives money to hospitals and universities 
to help them go on with their studies. Every 
day new things are being found out about mi¬ 
crobes, and new ways are being discovered to 
prevent their attacking human beings and caus¬ 
ing illness. 
