454 H. JS. Washington — Jerome Meteorite. 



In the above all the phosphorus is assumed to exist as schrei- 

 bersite, soda and potash to belong to the feldspars, and the NiO 

 to be the product of the oxidation of the nickel-iron. It will 

 be evident that if, as seems certain from the microscopic ex- 

 amination, the limonite is derived entirely from the metallic 

 iron, the amount of metallic Fe originally present was higher 

 by some 12 per cent, and the nickel higher by 1*25 per cent. 

 The nickel-iron present in the fresh stone would then have 

 amounted to about 17*50. That the orthorhombic pyroxene is 

 bronzite rather than enstatite is shown by its calculated com- 

 position, which is 



Si0 2 56-8 



MgO _.. 32-6 



FeO__ _ 10*6 



100-0 



The pyroxene is largely diopside, with less than 10 per cent of 

 the aluminous augite molecule. The plagioclase is an oligoclase 

 of the composition Ab 5 An i% The orthoclase molecule probably 

 also belongs with it, in which case it must have about the 

 composition A^Oi^An^ 



On the whole the stone seems to belong to a rather wide- 

 spread group, and does not differ essentially from several that 

 have been recently described from this continent; e. g., the 

 Salt Lake City,* the Bluff, f the Beaver Creek,;); and the Wash- 

 ington, Kansas,! meteorites. 



. * Dana and Penfield, This Journal, (3), xxxii, 226, 1886. 

 f Whitfield and Merrill, This Journal, (3), xxxvi, 113, 1888. 

 X Howell and Merrill, This Journal, (3), xlvii, 430, 1894. 

 || Kunz and Wemschenk, Tsch. Min. Petr. Mitth., xii, 177, 1891. 



Locust, N. J. April 22, 1898. 



