558 Dr. Walter Flight — History of Meteorites. 



the same ingredients as the matrix, and often differ from it only in 

 being more coarsely granular, the chondra of terrestrial rocks are 

 shown by the microscope to be differently constituted from the 

 matrix. Tschermak is of opinion that in the case of the meteorites 

 solid masses have been reduced to powder by mutual attrition, the 

 tougher particles withstanding the action becoming rounded, and 

 that dust and spherules have undergone subsequent segregation. 

 The stone of Gopalpur consists, according to Exner's analysis, of : 



Nickel-iron 20-35 



Magnetic pyrites 4-44 



Olivine 28 86 



Bronzite 35-60 



Felspar 10-75 



Chromite ... ... ... ... ... trace 



100-00 



The nickel-iron has the following composition : 



Iron = 90-37 ; Nickel = 9-11 ; Cobalt = 0-52. Total 100-00. 

 and the portions separated by acid : 



Si0 2 A1 2 3 FeO MnO CaO MgO K 2 Na 2 





. 38-31 



0-54 



25-72 — 0-72 



34-71 — 



— = 100-00 



B. Insoluble . . 



57-95 



5-19 



10-03 0-57 3-04 



21-42 9-45 



1-35 = 100-00 



This, it will be seen, is one of the few meteorites containing a 

 variety of felspar, which in this instance amounts to more than 10 

 per cent. Tschermak was unable to determine by an examination 

 of microscopic sections whether it was oligoclase. 



1865, August 25th. — Sherghotty, near Gya, Berar, India. 1 



According to Lumpe's analysis, given below, this meteorite con- 

 sists almost exclusively of silicates, only a trace of metallic iron 

 and a very small amount of sulphur having been met with. It 

 contains : 



Silicic acid 50-21 



oiiiru. iaiu 



Alumina 



5-90 



Iron protoxide 



21-85 



Magnesia 



.. 10-00 



Lime 



10-41 



Soda 



1-28 



Potash 



0-57 



100-22 



These results show that the Sherghotty stone belongs to the class 

 including the meteorites of Stannern, Juvinas, and Jonzac. The 

 stone examined by Crook in Wohler's laboratory contained more 

 than nine per cent, of nickel-iron and very little lime, from which 

 it is apparent that what Crook held to be the meteorite of Sherghotty 

 is a specimen of another fall. 



1 E. Lumpe. Mineralogische Mittheilungen, 1871, 55.— G. Tschermak, Mineral- 

 ogische Mittheilungen, 1871, 56; and 1872, 87; Sitzber. Ak. Wiss. Wien, 1872, lxv. 

 122; Jahrbuchfiir Mimeralogie, 1872, 733.— See also F. Crook. On the Chemical 

 Constitution of the Ensisheim, Mauerkirchen, Sherghotty, and Muddoor Stones. 

 Inaug.-Dissert.) 1868. Gottingen : E. A. Huth. 





