324 Dr Bischors Examination of Three Inflammable Gases 



The carbon which was deposited in the porcelain tube con- 

 sisted of extremely thin foliated particles, which had become 

 so rolled, that they formed thin little tubes, which were from 

 a few lines to an inch in length. They had a steel-grey co- 

 lour, and a strong metallic lustre, and were perfectly similar 

 to graphite, both as that substance is found in nature, and 

 as it is artificially formed in many iron slags. An empyreu- 

 matic smell was perceptible in the porcelain tube. 



I ignited the portion of gas obtained from one of the above 

 experiments in the detonation tube. I mixed 1 volume de- 

 composed gas with 3 volumes oxygen, and obtained, in two 

 experiments, the following results : 



Experiment 1. Experiment 2. Mean 3. 



Volumes. Volumes. Volumes. 



Gaseous mixture, . . 4 4 4 



Disappeared by detonation, . 1.45 1.477 1.4635 



Disappeared by use of liquid potash, 0.638 0.613 0.6205 



The 0.6205 carbonic acid gas which was produced, corresponds 

 to a similar quantity of carburetted hydrogeli gas. Upon the 

 supposition that no other inflammable gas was present except 

 carburetted hydrogen and hydrogen, the latter would amount to 



1. 1.4635- \ . 0.6205 = 0.1484 v.* 

 o o 



The gas decomposed by heat thus consisted of undecomposed carburetted 

 hydrogen, ...... 0.6205 



Hydrogen gas, . . . . . . 0.1484 



Foreign gas, . . . . . . 0.2311 



1.0000 



According to what has been assumed 0.1484 v. hydrogen must 

 proceed from the decomposition of the half volume = 0742 

 carburetted hydrogen gas. Upon this principle the increase 

 of volume would amount to 0.11 v. Regarding the foreign 

 gas, there is no other supposition admissible, but that it is 

 partly decomposed atmospheric air. It is true that the ana- 



* Thus, should a given gaseous mixture consist of a; volumes hydrogen gas, 



and y volumes carburetted hydrogen gas, and ifa represent the volume lost by 



detonation, and h the volume of the carbonic acid gas which is formed, it is 



2 4 



easy to perceive that « = - a —• :- (>. 



a o 



