260 A. W. Wright— Oases contained in Meteorites. 



and the other cases. As it was found that this degree of heat- 

 ing left too small a proportion of the gas for the second determi- 

 nation, as also for other reasons mentioned above, the temperature 

 of about 350° was employed in the succeeding experiments : 



Red heat, 



Total, 



Parnallee, 350° 



Red heat, 



Total 



Weston, 350°. 



Red! 



Total 



Iowa, 500°, 



Red heat, 



Total, 



heat was 



le-lg 



216 



2-26 

 1-66^ 



12-37 



0-93 

 3-41 



^~88 



"T40 



2-05 



31-89 



1-78 



81-01 



1-99 



1-73 



13 36 



1-91 



33-97 



7-35 



6-00 



49-99 



2-69 



60-29 



4-35 



3-61 



29-50 



2-25 



87-53 



1-13 



1-22 



8-72 



140 



72-43 



2-53 



3-22 



20-03 



1-79 



81-02 



1-74 



2-08 



13-59 



1-57 



86-29 



1-84 



1-19 



8-59 



2-09 



62-I8 



_3-43 



3-10 



2806 



3-13 













80-78 



2-20 



1-63 



13-06 



2-33 



58-04 



401 



00 



34-82 



3-13 



19-16 







74-49 



6-14 



35-44 



~i^ 



~0^ 



57-88 





aed, i 



! of the lo' 



longer than in the subsequent experiments with the others, and 

 the result shows a greater diminution in the amount of carbon 

 di-oxide obtained. Rejecting the last column in the analysis 

 quoted above, we have for the total average percentage up to 

 red heat, CO^, 49'51 ; CO, 2'64 ; H, 43-93; N, 392, which 

 corresponds more nearly with the results in the other cases. 

 The numbers given in this table show a very satisfactory con- 

 cordance, though there are slight differences"! doubtless arising 

 from the fact that the temperatures employed, and the times of 

 exposure to the heat, though approximately the same in the 

 different instances, could not be made absolutely identical. 

 The mass of material operated upon was also not always the 

 same, which would produce a slight difference in the time re- 

 quired for the evolution of the gas, and the completeness of its 

 elimination. 



It will be observed that a small amount of marsh gas 

 was found in each of the portions of gas obtained m the 

 present investigation. This might possibly be accounted 

 ior, in the case of the higher temperatures, by the decom- 

 position of organic matter taken up by the meteorite sub- 

 sequently to its fall, or of carbonaceous matter originally 

 contained in it; but as such decomposition would not be 

 likely to take place, to any great extent, at so low a tempera- 



