294 Fusion- Strtidures in Meteorites. 



No. 17, which was found by Indians near Mcyellones, in the 

 Desert of Atacama, S. A., and which is in greater part metal, 

 is, according to E. Ludwig :* 



Iron, - - - - 91.58 



Nickel, - - - 7.14 



Cobalt, - • - - 0.41 



Phosphorns, - - 0.45 



Cojoper, - - - trace. 



99.53 



Rammelsberg, however, states that the cavities contain a 

 brownish-white silicate of calcinm and iron, containing phos- 

 phoric acid, perhaps olivine. 



Omitting from the list Nos. 11 and 17, as not being strictly 

 meteorites in the sense in which the term is here regarded, fif- 

 teen different specimens will remain. In eleven of these I met 

 with fusion-structures, and, having made drawings of some of 

 the most striking, will now call attention to some of the figures 

 on Plates XIX and XX. 



The drawings being executed in India ink, of course show 

 only in black and white. The white indicates the mineral mat- 

 ter, the black the metallic portions. Frequently, however, the 

 former was not of a pure white, but tinged with a yellow or 

 brown tint, more or less pronounced, which effect naturally is 

 lost in the plates. 



On looking over Plates XIX and XX, it will be seen that the 

 structures depicted are essentially of two kinds : — those in which 

 the mineral matter occurs without intervening metallic material, 

 and those in which tlie former is scattered through the metal, 



A closer examination of some of these structures will now be 

 entered into, 



A very remarkable formation is that presented in Plate XIX, 

 Fig, 1. It occurs in (Slide 2) Meteorite 2, which fell at Weston, 

 Conn., December, 1807. It consists of twelve or thirteen bars 

 which are grouj)ed in such a manner as to afford an appearance 



* Watts' Diet, of Chem., 2(1 sup , p. 796. Wien. Acad. Ber., LXHI [2], 323. 



