258 A. W. Wright— Gases contained in A feteonies. 



latter gave CO^, 9-75: CO, 38-33; H, 35-83; N, 16 09, and 

 3-17 volumes of gas in all. In both these instances the iron was 

 very strongly heated, the temperature in the latter case being 

 carried nearly to whiteness, and continued for several hours. 

 The volume of gas was divided into three parts, and the por- 

 tions obtained at the beginning, middle, and end of the opera- 

 tion separately analyzed. Keducing the volumes given by 

 Professor Mallet for each of the gases in these portions to 

 parts in one hundred, we have the following numbers : 



Mlddlt 



6-01 



End, 3-69 47-00 i: 



The percentages in the total amount of gas obtained are given 

 above. It will be seen that the results for the first two por- 

 tions closely resemble those given for the Tennessee iron in the 

 table. 



In the experiments with meteorites of the stony class the 

 same method, in general, was pursued, except that the first 

 temperature was somewhat lower, being about 350°. This was 

 adopted in order to lessen as much as possible the chemical 

 a(;tion of the substances upon each other, and at the same time 

 because the relative proportions of the amounts of gas obtained 

 at this and the higher temperature wei-emore convenient for the 

 analyses. 



The meteorites examined were the following : First, that 

 from Guernsey Co., Ohio, which fell on May I, 1860, and is 

 described by Professor J. L. Smith, in this journal, II, xxxi, 

 87. It contains 10-7 per cent of nickeliferous iron, and has a 

 specific gravity of 3*55. 



Second, one from Pultusk, in Poland, which fell on 

 January 30, 1868. This was subjected to an elaborate inves- 

 tigation, and described, bv Dr. G. vora Kath.* Several thou- 

 sand small masses were collected, of which, some examined by 

 vom Eath were found to contain 10-06 per cent of nickeliferous 

 iron, though other specimens analyzed by Werther and Kam- 

 melsberg gave 21-08, and 21-78 per cent respectively. f It 

 resembles somewhat the Iowa stone in its general character, 

 and has a specific gravity of 3-725. The writer is indebted to 

 the courtesy of Professor G. J. Brush, who sacrificed an excel- 

 lent specimen for the examination, from his private cabinet. ^ 



Third, the meteorite of Parnallee, India, Feb. 2>i, 185/, 

 found by Pfeiflfer:}: to contain 6*84 per cent of meteoric iron. 

 It has a specific gravity of 3-44. 



50jaJbirigen Jubilaum der Univereitat Bonn. 



Konigl. Aki 



.. der Wi 



Die chemische ] 



