TROPICAL FORESTS 
69 
the hearth. Split the branch so that there will be a relatively 
fiat surface and make a concave depression in it to receive 
the drill. Cut a narrow slot leading out from the side of this cup 
Figure 15.— Making fire with how drill, and two-stick fire drill. 
to receive the wood dust produced by the rubbing of the spindle or 
drill against the wood of the hearth; sometimes a very small 
