Dr. Walter Flight — History of Meteorites. 



369 



Tn an examination of this iron, undertaken with the view of deter- 

 mining the presence of combined carbon, Boussingault found it to be 

 composed of: — I. II. 



Iron 89-53 8973 



Nickel 9-76 9-90 



Carbon combined 0-12 0-12 



Insoluble portion 0*59 0-25 



Sulpbur trace trace 



100-00 100-00 



1828, June 4th. — Richmond, Chesterfield Co., Virginia. 1 

 This meteorite, the chemical characters of which were studied by 

 Shepard, the physical by G-. Eose, has recently been found by 

 Kammelsberg to have the following composition : 



Nickel-iron 8-22 



Iron Sulpbide 4-37 



Olivine 45-73 



Undecomposed Silicate 41-68 



100-00 

 The silicates having been separated by treatment with acid and 

 sodium carbonate were found on analysis to have the composition 

 given below : 



Si0 2 A1 2 3 FeO MgO CaO 



A. Soluble. 39-40 — 18-21 41-69 0-80 = 100-00 



B. Insoluble. 53-74 5-32 13-17 22-23 5-54 = 100-00 



In the soluble portion the ratio of Fe to Mg is 1 : 4, which shows 

 it to be an olivine identical in composition with that variety of this 

 mineral which has been met with in the siderolites of Brahin and 

 Atacama. The insoluble portion, according to Rammelsberg, is either 

 a bronzite containing lime, or a mixture of that mineral with diopside. 



Shepard had found this meteorite to be composed of 6 per cent, of 

 nickel-iron, with some magnetic pyrites, and 90 per cent, of olivine, 

 the residue being howardite and lime phosphate. 



1835, July 31st, or August 1st. —Charlotte, Dickson Co., Tennessee. 2 



The iron, which is found disseminated in small particles through- 

 Out the mass of many meteoric stones, represents in miniature the 



1 C. Eammelsberg. Monatsber. Ah. Wiss. Berlin, 1870, Lsx. 440. 



2 J. L. Smith. Uompt. rend., 1875, lxxxi. 84. 



DECADE II. VOL. II. NO. Till. 24 



