A. W. Wright—Gases contained in Meteorites. 171 
of the stony fragments is, in its composition, approximately a 
mean between the two others, as was to be expected, but it 
experiments by the writer may be mentioned here, as illustra- 
Hons, though but little weight is attached to them as quantita- 
‘0 contain about 13 per cent of carbon di-oxide, the residue 
ne chiefly hydrogen. Another specimen of trap containing 
the mineral prepared for microscopic examination. T his gave off 
Somewhat more than its own volume of gas, which was found to 
contain some 24 per cent of carbon di-oxide. The gas in these 
evo Was not given off as readily as from the meteorites, and was 
- ved rather suddenly as a temperature ap roaching red-heat 
4s reached. If it should appear improbable that the large 
* Proc. Royal Soc., June 16, 1864. 
+ Chem. News, June 9, 1876, p. 237. 
