1876. 1 -^t) J [Sadtler. 



On examining the bromine used for absorption with the Leechburg gas, 

 there was apparently a slight layer upon the surface of the bromine, which 

 might have been ethylene bromide. On neutralizing the excess of bromine, 

 however, no distinct evidence could be had of the presence of the bromide, 

 so that the result was left uncertain. 



The quantitative analyses were next made. In these the carbonic acid, 

 carbonic oxide, illuminating hydrocarbons, and free oxygen were tested 

 for and when present removed by suitable absorption re-agents, while the 

 hydrogen, marsh-gas and ethyl hydride were determined by the eudiome- 

 ter analysis. Any nitrogen present remains over and is estimated at the 

 conclusion of the analysis. 



Burns Well Oas (average of two analyses). 



Carbonic Acid 34 



Carbonic oxide trace 



Illuminating hydrocarbons (C" H jn) 



Hydrogen 6.10 



Marsh-gas (CHJ 75.44 



Ethyl-hydride (C^ H^) 18.12 



Propyl-hydride (Cj Hg) trace 



Oxygen 



Nitrogen 



100.00 

 Leechburg Oas (average of two analyses). 



Carbonic acid 35 



Carbonic oxide 26 



Illuminating hydrocarbons (C^ H^^) 56 



Hydrogen 4. 79 



Marsh-gas 89.65 



Ethyl-hydride 4.39 



Propyl-hydride trace 



Oxygen 



Nitrogen 



100.00 

 Harvey Well Oas. 



Carbonic acid 66 



Carbonic oxide; trace 



Illuminating hydrocarbons 



Hydrogen 13.50 



Marsh gas 80.11 



Ethyl-hydride 5.72 



Propyl-hydride trace 



Oxygen 



Nitrogen 



99.99 



PROC. AMHE. PHILOS. SOC, XVI. 97. 2a 



