same way? What does a diphtheria germ look 
like? What is an antitoxin? What is a typhoid 
germ like? What is the tuberculosis germ like? 
Where do they come from? What is lockjaw? 
What is malaria? How can we protect ourselves 
from malaria? How does the body fight microbes? 
What are antibodies? Does the effect of antitoxin 
last? 
VI Man’s Fight Against Microbes 85 
How long have we known about microbes? 
What was bleeding? What was the Black Plague? 
How did the discovery of microbes help us? What 
stopped work on the Panama Canal? Do we 
know all about microbes? 
VII How Some Familiar Things Look 
Under the Microscope 95 
What can we see through a microscope? What is 
a leaf like? What makes leaves green? What 
is the nucleus? Why are the tops of leaves waxy? 
What are the rings in wood? How does the 
Potato look? What are the eyes? What is inside 
a green pea? What is pollen? How is it carried 
about? What does hair look like under a micro¬ 
scope? How does skin appear? 
VIII The Microbe’s Greatest Service to 
Mankind 111 
What is the greatest work of microbes? What 
would happen if there were no microbes? 
