Smithsonian Report, 1908. — Guttmann. 



Plate 6. 



iiiiiiiiiiiiiiiiiiiiiin I III ill I """'" irir 



FiG. 1.— Smokeless Flake Powder Seen Under the 

 Microscope in Ordinary Light. 



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-:^:»:- 



■'.'^■y 



V^'^^'^ 



Fig. 2.— Smokeless Flake Powder Seen Under the 

 Microscope in Polarized Light. 



