Smithsonian Report, 1917. — Merrill. 



Plate 



Photomicrographs of Stony Meteorites. 



1. Ctructure cimulaf ing that of gabbro or diabase; 2. Structure pimulatiiiff that of a pyroxcnitc. 3, 4, 5. Chon- 

 dritic structures quite unlike those of any terrestrial recks. 



