Figure I. (F. R. Harriet) 



as many as several yards long. These streaks are about an 8th of an inch or a millimeter 

 apart. 



The effect must be somewhat related to this type of phenomena. 



The thing interesting about it, since these have actually deformed a fairly solid 

 body like this paint, is that there must be some self-stabilizing feature, so that once a 

 little seed is developed, this process continues from then on, in essentially the same place. 



Also another interesting thing about this, of course, is that the boundary layer 



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