WHAT PEOPLE ARE MADE OE 
37 
studied all those years just so he could find out what he 
really was made of, and what his teasing sisters were 
made of! 
If someone asked you what you were made of, you 
would be very quick with your reply ; 
“Flesh and blood and bones!” 
But if this curious-minded person went on and asked 
what your flesh and blood and bones were made of; 
what would you say then ? I know what my brother the 
doctor would say; he would reply, 
“Cells! Living cells!” 
And you would shake your head and think he was 
joking. Why, a cell is a high-walled, narrow room where 
prisoners are kept—what have stone walls and barred 
windows to do with the make-up of a human body? 
“Living cells,” he said. What is a living cell? 
A living cell is a tiny piece of clear, colorless jelly 
called Protoplasm, so small you cannot possibly see 
it without the help of the man with the microscope. 
In the tiniest drop of your blood some five millions of 
blood-cells are floating—as many as there are people in 
New York! 
You would think that so tiny a form had no room with- 
in itself for anything at all, but let the man with the 
