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times its original length. If 
you touch a spoke or a 
portion of the frame-work 
it does not adhere in the 
least, but remains firm and 
straight as it was before. 
We shall have to 
peep again into the mi- 
croscope to see why 
the threads behave so 
differently. Here is a 
picture of the sticky, 
elastic thread. It 
looks lke a string 
of tiny beads. ‘The 
beads are small 
masses of a sub- 
stance resembling — 
glue. When the 
thread 1s first 
spun this glue 
covers the en- 
tire surface, 
AT 


















The inelastic threads re- 
Two spokes of a web with 
placed by sticky threads 
| the inelastic threads 

