258 Analysis of the KJiettree Meteorite. [No. 4, 



and all or almost all the Cobalt. The higher specific gravity of the 

 light-coloured portion accords with the greater quantity of metallic 

 Iron it contains. The state of oxidation of the iron was not experi- 

 mentally determined, but was assumed to be that of protoxide, in 

 accordance with the analyses given of similar terrestrial minerals. 

 The cause of the difference between the loss of weight sustained by 

 boiling the mineral after the action of acids and the weight of the 

 Silica obtained, appears to depend upon small quantities of other con- 

 stituents removed by the Carbonate of Soda in solution, or in very 

 fine states of suspension. In one experiment made with great care, the 

 difference of weight was nearly accounted for in this way in Alumina 

 and Oxide of Iron, Lime and Magnesia. In this case, the loss of 

 weight by Carb. of Soda was 12-015 grs., the Silica obtained lToGo grs., 

 loss only "452 gr : of the above constituents there was obtained '315 gr. 

 leaving only unaccounted for -137 gr. from 100 grs. of the stone. 



I have compared its composition with that of other stones, as given 

 in Buchner's Treatise on Meteorites, Liepzig, 1863, and find it bears a 

 pretty close resemblance to that of " Blansko," (Briinner Kreis, 

 Miebren), November, 1833, and that of "Insel Oesel" in Russia, 

 April, 1855, and a still closer one to that of " Klein- wenden" by 

 Nordhausen, Prussia, of September, 1843. 



