Intelligence and Miscellaneous Articles. 379 



was separated from cobalt and nickel by addition of a sufficient 

 quantity of acetate of potash, in order to convert the nitrates into 

 acetates, and evaporation to dryness in a water-bath. The dry mass 

 was boiled with water and filtered. From the filtrate, which con- 

 tained the whole quantity of oxides of cobalt and nickel, these were 

 precipitated by caustic potash. The precipitate of sesquioxide of 

 iron was redissolved in hydrochloric acid and precipitated by am- 

 monia. This method gives excellent results if used with care ; the 

 only objection might be, that the sesquioxide of iron thus separated 

 is difficult to filter. 



The insoluble residue was ignited and fused with bisulphate of 

 potash. On treating the fused mass with water, a white substance 

 of the appearance of titanic acid remained, which hydrochloric acid 

 slowly dissolved. This substance and sesquioxide of iron were pre- 

 cipitated by ammonia, and from the filtrate, oxide of nickel separated 

 as usual. The precipitate was weighed, dissolved in hydrochloric 

 acid, and the iron precipitated by sulphide of ammonium after the 

 addition of tartaric acid and ammonia. From the sulphide of iron the 

 iron was determined as usual. From the filtrate, the other substance 

 remained after the tartaric acid was destroyed by heat. It was, 

 however, a very small quantity, and only sufficient for one blowpipe 

 reaction. The borax bead gave in the inner flame an enamel of a 

 bluish colour. I therefore believe that it is titanic acid, though the 

 reactions somewhat difi'er. 



The insoluble residue seems to be a combination of iron, nickel, 

 and titanium. It contains no cobalt. Neither part of the meteorite 

 contained carbon, sulphur, phosphorus or tin. 



I. II. 



Iron =96-17 95-92 



Nickel = 3-071 „ -- 



Cobalt = 0-42/ '^^' 



Insoluble = .. 0*57 



99-66 100-00 



ITie insoluble part consisted of a steel-coloured powder in micro- 

 scopic crystals, which showed three-sided planes. Its composition is — 



Iron =5507 per cent. 



Nickel =28-78 .. 



? Titanium =:16-15 



100-00 

 It is remarkable that the elements in the insoluble part are in the 

 following ratio : — Fe : Ni : ? Ti=6 : 3 : 2. 

 — Silliman's American Journal, March 1854, p. 239. 



ox M. foucault's pendulum experiments*. 

 Your Committee having undertaken to make this experiment with 

 as much care as possible, have the honour to submit the following 

 report on the results obtained by them. 



* Extraetpd from the Second Report of tlic Special Committee of the 

 Literary and Historical Society of Canada. 



