1890.] KEW YORK ACADEMY OF SCIENCES. 193 



made of it, is about sixty miles. The mass, which weighed 

 about 80 pounds, or 36.5 kilos, was rusted on the surface to a 

 depth, in some places, of ten to twelve millimetres ; and deep 

 pits, some two centimetres across, are observed in spots, where 

 grains of olivine have probably dropjjed out. The meteorite was 

 largely made up of tine, yellow transparent olivine, resembling 

 that of the famous Pallas iron, with a specific gravity of 4.72. 



Taking the specific gravity of the iron at 7.6, and that of the 

 olivine at 3.3, we find that the Turner mound meteorite consists 

 of about three parts of olivine to one of iron. Several of the 

 Kiowa masses have about the same constitution. For compari- 

 son, see the analyses of the Kiowa meteorites, given above, and of 

 the olivine and iron from the Turner mound,* nere inserted, as 

 follows : — 



Olivine. 



Per cent. 



SiO„ 40.02 



Fed 14.06 



MnO.... ; 0.10 



MgO 45.60 



99.78 

 Iron. 



Per cent. 



Fe 89.00 



Ni 10.65 



Co, 0.45 



Cu tr. 



100.10 



When the Carroll County iron was described by the author in 

 the American Journal of Science [Vol. XXXIII. , March, 1887], 

 it was suggested that the pieces found by Prof. Putnam in the 

 Miami mounds had probably been taken from that mass, since 

 no other olivine meteorite had up to that time been found in 

 North America; while that of Carroll County contained a large 

 percentage of olivine, even greater than the mound specimens. 

 Very little cutting had been done on the Carroll County mass ; 

 and it proved, on being cut, not to be a pallasite, but a brahin- 

 ite variety of meteorite. In the Little Miami valley meteor- 

 ite are embedded circular grains or crystals of olivine ; whereas 

 that of Carroll County consists of a mass of olivine in which the 

 iron serves as a filling between the crystals. When a section 



• Kennicutt: Sixteenth and Seventeenth Reports of the Peabody Museum' 

 of Archaeology, p. 382. 



