HOW MOLECCEES MAKE MASSES 



59 



. -•■ 



^r 



% 



Figure 4a. Collagen fibril from 

 human skin corium shadowed with 

 chromium, (x 111,000) [Courtesy 

 Prof. Francis O. Schmitt, M.I.T.] 



Figure 4b. Collagen fibril from 

 rat tail tendon, stretched by peeling 

 back of collodion supporting film. 

 (X 21,000) [Ref: Schmitt, Hall and 

 fakus, /. Cell, and Comp. Physiol., 

 20, 11 (1942)] 



