214 Rev. S. Haughton on the Chemical and Mineralogical [June 21, 



II. ^^On the Chemical and Mineralogical Composition of the 

 Dhurmsalla Meteoric Stone.^' By the Rev. Samuel Haughton, 

 M.D., E.R.S., Fellow of Trinity College, Dublin. Received June 

 6, 1866. 



On the 14th July 1860, at 2.15 p.m., a remarkable meteoric 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 but who were obliged, in conse- 

 quence of their coldness, instantly to drop them. 



The specific gravity of the Trinity College specimen was found as 

 follows : — 



Weight in air 3335*4 grs. 



Weight in water 2354*1 „ 



Sp.gr = 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 following results : — 



grs. 



Silica 18*95 



Alumina 0-14 



r Present originally as 



Peroxide of iron 14*1 1 -! protoxide and proto- 



L sulphuret of iron. 



Carbonate of lime none 



Pyrophosphate of magnesia .... 51*31 

 Potash and soda chlorides .... 0*30 

 Platino-chloride of potassium . . 0*20 

 Oxide of manganese (Mn^ 0^) . . 0'66 

 On treating another 100 grs. of the meteorite fof sulphur, by boiling in 



