Smithsonian Ref>ort. 1947. — Bas 



Plate 1 



1. ISIodel of a segment of a linear methyl silicone molecule. 



2. The water-repellent nature of the silicones. Radio coil forms made water- 

 repellent with silicone treatment. Their surfaces are nonconducting under 



iiKiisf ure-c()ii(lensiiii); condilioiis. 



