May, 1902. Meteorite Studies, I — Farrington. 295 



bounded chiefly by pinacoids. The chromite more often has a red 

 tone than the brown described by Weinschenk, its deep red grains 

 being frequently seen in the sections. Both nickel-iron and troilite 

 grains sometimes enclose small siliceous particles of what is probably 

 chrysolite, indicating the latter to be the earlier formation. 



As regards classification, the Long Island meteorite is classed 

 by Wulfing as a crystalline spherical chondrite, Cck.* Beaver Creek, 

 Bethlehem, Lumpkin, Menow, Prairie Dog Creek, Richmond and 

 Savtschenskoje are other meteorites included in the same class. 



Brezina classifies Long Island as a crystalline chondrite Ck.,| in 

 which group are included Erxleben, Klein-Wenden, Kernouve and 

 many others. By Meunier, Long Island is put in Class 34, Erxlebenite, 

 which includes monogenic meteorites of fine grain made up chiefly of 

 chrysolite and bronzite and containing visible grains of nickel-iron. 

 Bluff, Erxleben, Kernouve, Klein-Wenden, Menow and Pipe Creek 

 are among the other meteorites brought by Meunier into this class. 

 Thus the place of Long Island in classification seems to be quite 

 generally agreed upon. Differences can, of course, be noted from 

 other meteorites with which it is classed, it being, for instance, more 

 compact and of finer grain than Beaver Creek and containing much 

 less nickel-iron than Pipe Creek. 



Of its well-marked crystalline character, however, there can be 

 no doubt, nor, to my mind, of its monogenic origin. 



Absorption by a siliceous magma, of iron in preference to nickel, 

 seems to me to afford a reasonable explanation of the high percentage 

 of nickel in the metallic portion of the stone shown in the following 

 analysis. Such a high percentage of nickel in the nickel-iron of stone 

 as compared with iron meteorites is common and must be of some 

 significance. If the meteorite is simply tuffaceous in origin, one would 

 expect the nickel-iron to have the composition of that of the iron 

 meteorites uninfluenced by the accompanying silicates, but such is not 

 the case. 



Again, the outlines of the crystal individuals in the Long Island 

 meteorite are sharply and fully developed and are in stable and mag- 

 matic position with reference to each other. Some of them are larger 

 than the individual chondri and yet exhibit no sign of wear or fracture. 

 Accordingly the believers in the tuffaceous character of all stone 

 meteorites would find, I think, little to support their views in an 

 examination of this stone. I can see no indications in its structure 

 of any other origin than one of cooling in place from a fused magma, 



*Die Meteoriten in Sammlungen, Tubingen, 1897, p. 453. 



fDie Meteoriten Sammlung des K.K. Naturhistorische Hofmuseums, Wien, 1895, p. 3^3. 



