9(J APPARATUS FOR THE ANALYSIS OF GASSES. 



After separating the sulphuretted hidrogen and carbonic 

 acid gasses by agitation with liquid potash, the residue, con- 

 sisting of the inflammable gas mixed with the proportion of 

 olefiant gas produced along with it, was submitted to com- 

 bustion. The following table shows the average results of 

 a number of these experiments. 



TABLE II. 



General obser- 

 Yations. 



defiant gas. 



An attentive examination of the results, contained in both 

 the tables, suggests the following general remarks. 



1. The olefiant gas is a very sparing product of the dis- 

 tillation of pit coal. It is found only in the tirst portions, 

 aud even of these it does not compose more than 5 per cent. 



Its 



