266 The Rev. S. Haughton's Notes on Mineralogy. 



Mineralogical Composition of the Dundrum Meteorite. 



Per cent. 



1. Nickel-iron 20*6o/*™ii . l *'*l 



\Nickel 1-03 



2. Protosulphuret of iron .... 4*05 



3. Chrome-iron 1*50 



4. Mineral soluble in muriatic acid, 1 „o.no 



probably Chrysolith ... J 



5. Minerals insoluble in muriatic acid. 40*77 



100-00 



No. XIX. On the Chemical and Mineralogical Composition of the 

 Dhurmsalla Meteoric Stone*. 



On the 14th of July, I860, at 2.15 p.m., a remarkable me- 

 teoric stone fell at Dhurmsalla, in the Punjab; a small specimen 

 of which was forwarded to the Geological Museum of Trinity 

 College, which I have analyzed, with the results contained in the 

 following paper. 



The direction of the motion of the meteorite was ascertained 

 to be from N.N.W. to S.S.E. 



The cold of the fragments that fell was so intense as to benumb 



the hands of the coolies who picked them up and who were 



obliged, in consequence of their coldness, instantly to drop them. 



The specific gravity of the Trinity College specimen was found 



as follows : — 



grs. 

 Weight in air ... 3335 -4 

 Weight in water . . . 2354*1 

 Specific gravity . . =3*399 



The stone is grey, close-grained, and splintery in fracture, and 

 presents fewer specks of metallic iron and magnetic pyrites than 

 usual, and was coated with the ordinary black pellicle on its outer 

 side. 



From 100 grs. acted on with iodine, which dissolved the alloy 

 of iron and nickel, there were obtained, of peroxide of iron 9*85 

 grs., and of protoxide of nickel 1*96 gr. 



The portion insoluble in iodine was next acted on by dilute 

 muriatic acid and evaporated to dryness at 212°, then moistened 

 with muriatic acid and filtered, by which process it was divided 

 into a soluble and insoluble portion; the portion left on the 

 filter was boiled with carbonate of soda, so as to dissolve the free 

 silica, which was found to be 18*95 grs. This was added to the 

 portion originally soluble in muriatic acid, so as to give the fol- 

 lowing results : — 



* Read before the Royal Society, 1866. 



