VI CONTENTS 



Plate 17. (Upper) Brecciated structure of the Cumberland Falls, and (lower), 

 St. Michel stones. 

 18. Chondrules and chondritic structure of Selma, Ala., and Cedar, Tex., 

 stones. 

 • 19. (Upper) Microstructure of the Bluff and (lower) Estacado stones. 



20. Microstructure of (1) Indarch stone, and (2) of Cullison stone, show- 



ing a collar of metal about a fragmental chondrule. 



21. (Upper) Slice of Anthony meteorite showing troilite with border of 



metal, and (lower) Section of dark inclosure of Cumberland Falls 

 stone showing distribution of metal. 



22. Chondrules in Barratta, Cullison, Elm Creek, Hessle, and Parnallee 



stones. 



23. (Upper) Olivine chondrule in Beaver Creek and Cullison stones; 



(lower left) Enstatite chondrule in Cullison; (lower right) Twinned 

 enstatite chondrules in Parnallee stone. 



24. Chondrules in (1) Parnallee; (2) Tennasilm; and (3) Elm Creek 



stones. 



25. (1 and 2) Chondrules and chondroidal forms from the Bjurbole stone. 



(3) Broken surface of Bjurbole stone, about natural size. 



26. Toluca iron (1) before, and (2) after roasting. 



27. (1) Chondrule in Parnallee stone with secondary glass border; (2) 



Same showing effects of crushing; (3, 4, and 5) Chondrules from 

 Hendersonville, Troup, and Ensisheim stones showing effects of 

 crushing. 



28. (1) Section through crust of Allegan stone; (2) Section through black 



vein in Bluff stone. 



29. (Upper) Faulted meteoric iron, New Baltimore, Pa.; (lower) Shat- 



tered stone from Cedar, Fayette County, Tex. 



30. (Upper) Broken surface of " kugelngriinstein, " Schemnitz, Hungary, 



showing chondroidal forms; (lower) Cut and polished surface of 

 the same. 



31. (1) Microsection of phonolite tuff, Hegau, Germany (after Cashing); 



(2) Chondroidal form in basaltic tuff (after Foye) . 



32. (1) Chondroidal forms in nepheline basalt, Hussenberges, Westphalia 



(after Rinne) ; (2) Pseudochondritic forms of olivine in peridotite, 

 Raton, N. Mex. 



