216 PETBOLOGY. 



METEORITES. 



[This section is chiefly from the pen of Dr. Flight. Details may be seen in his 

 * History of Meteorites,' 1869-1875, now publishing in the Geological Maga- 

 zine.] 



Apjohk, R. On the Analysis of a Meteoric Stone, and the detection 

 of Yanadium in it. Journ. Chem. Soc. scr. 2, vol. xii. p. 104. 



The Adare Meteorite (Sept. 10, 1813) has the following composition : — 

 nickel-iron 19*07, magnetic pyrites 6-54, chromite 1*75, soluble silicate 

 35-44, and insoluble silicate 37*07 ; total 99*87. The metallic portion 

 contains 14*275 per cent, of nickel and 0*602 per cent, of cobalt. This 

 meteorite is the first in which the presence of vanadium has been de- 

 tected : the amount present was not determined ; but the author thinks 

 that it is about half that in certain trap-rocks of Ireland and Italy, and 

 that it occurs as an oxide associated with the chromite. The analyses 

 show the presence of a larger proportion of manganese oxide than has 

 been met with in any other meteorite. "W. P. 



BxjRKHAET, Dr. Die Meteoreisenmasse. von dem Berge Descubridora 

 bei Poblazon unweit Catorze im Staate San Louis Potosi der Ee- 

 publik Mexico. [Meteoric Iron from Mexico.] K. Jahrb. Heft 1, 

 pp. 22-28, with plate. 

 The last paper by the late Dr. Burkhart on the above subject gives 

 the history of the meteoric iron of Descubridora, Poblazon, near Catorze, 

 State of San Louis Potosi, which was found between 1780 and 1783. 

 He gives three drawings of this mass, which weighs 575 kilog. It is a 

 very malleable iron ; and many implements have been manufactured 

 from it. When etched it develops very complete figures ; the angle 

 109°, corresponding to that of the octahedron, is frequently noticed. 

 It encloses rounded masses of troilite, has the specific gravity 7*38, and 

 the following composition : — iron 89*51, nickel 8-05, cobalt 1*94, sul- 

 phur 0'45 ; chromium and phosphorus, traces : total 99*95. W. P. 



Daube^e, G. a. Note siir une meteorite tombee le 20 Mai, 1874, en 



Turquie, a Yirba pres Yidin. [Meteorite at Yirba.] Compt. Eend. 



t. Ixxix. pp. 276, 277. 



This meteorite has a dull black crust ; a fractured surface has a light 



grey colour and finely grained texture, with grains of metal distributed 



throughout the mass. In parts spherular structure is apparent; the 



colourless particles act on polarized light. The presence of nickel-iron, 



an iron sulphide, chromite, olivine, and an ingredient. which forms less 



than half of the stone, and is believed to be eastatite, was recognized. 



The stone is a member of a large class of meteorites, of which the Suce 



meteorite (Sept. 13, 1768) may be considered a type. "W. P. 



. Kote additionnelle sur la chute de meteorites qui a eulieu 



le 23 Juillet 1872, dans le Canton de St.-Amand (Loir-et-Cher). 



