Dr. Walter Flight — History of Meteorites. 595 



The sulphide and phosphide are assumed by the author to con- 

 sist of : 



Iron = 51-54; Sulphur = 33-71; andiron = 12-46; Phosphorus = 2-29. 

 Total = 10000. 



He regards the iron sulphide " as Fe 7 S 8 , troilite," a view which is 

 hardly tenable in face of the fact that Dr. L. Smith and Kammels- 

 berg, who have analysed the nodules of the mineral, which occur in 

 the meteorites of Knoxville, Seelasgen and Sevier Co., Tennessee, 

 have shown it to be a monosulphide. Again, no schreibersite has 

 yet been met with which does not contain a very considerable per- 

 centage of nickel, the whole of which metal the author takes to be 

 present in the metallic ingredient. 



The siliceous portions separated by treatment with acid and sodium 

 carbonate have the following composition : 



Si0 3 Al.O.jCroOg FeO MgO CaO Na,0 X 1 



A. Soluble ... 30-50 1-17 — 21-35 39-11 1-93 0-26 5-68 = 100-00 



B. Insoluble ... 57"67 3-22 0-95 8-62 23-70 4-00 1-84 3 — = 100-00 



While the soluble portion appears to be chiefly olivine, that which 

 resisted the action of acid may be taken to be bronzite, together with 

 a few per cent, of a felspathic ingredient, possibly labradorite. 



The Khettree meteorite, in point of composition, resembles that 

 which fell at Klein- Wenden, near Nordhausen, Prussia (1843, Sep- 

 tember 16th). 



1867, June 9th. — Tadjera, near Setif, Province of Constatine, 



Algiers. 3 



A meteor was seen to traverse the sky over this district, and two 

 stones, weighing 5*76 and 1-70 kilog., fell near Setif. The siliceous 

 portion of the stone has a black colour which distinguishes it from 

 most meteorites, and it is further remarkable for the absence of the 

 usual fused crust. It has a specific gravity of 3 -595 and the follow- 

 ing composition : 



Nickel-iron 8-32 



Troilite 8-04 



Chromite 0-20 



Soluble silicate 54-64 



Insoluble silicate 28-80 



100-00 

 The nickel-iron consists of: 



Iron = 91-6 ; Nickel = 8-4. Total = 100-0. 

 and the siliceous portions separated with acid and sodium carbonate : 

 Si0 2 Alo0 3 Cr 2 3 FeO MgO CaO Na 2 



A. Soluble ... 45-24 0-81 — 11-17 42-78 — trace = 100-00 



B. Insoluble ... 50-21 4-15 0-41 27"99 8-03 9-21 trace = 100-00 



In the soluble portion the silicic acid is in excess of that required to 



1 Constituents removed with sodium carbonate, but undetermined. 



2 "With trace of potash. 



3 S. Meunier. These presentee a, la Faculte des Sciences de Paris, 1869. Re- 

 cherches sur la Composition et la Structure des Meteorites, 13. Compt. rend., 1871, 

 lxxii. 339. Cosmos, March 28th, 1866, 7. — See also G. A. Daubree. Compt. rend., 

 1868, lxvi. 513. Cosmos, March 21st, 1868, 25. 



