Mixter — Products of the Explosion of Acetylene. 299 



Art. XXX. — On the Products of the Explosion of Acetylene, 

 and of Mixtures of Acetylene and Nitrogen / by W. G. 

 Mixter. Second Paper. 



[Contributions from the Sheffield Laboratory of Yale University.] 



The bomb described in the first paper* was again used in 

 the work unless otherwise stated. The figure of it is here 

 reproduced (fig. 1) for convenience. The acetylene gas for the 

 experiments was made by thrusting lumps of calcium carbide 

 through the tubulure of a glass gas holder previously filled 

 with water. The gas was dried as before by passing it through 





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a cylinder containing a kilo of small sticks of caustic potash. 

 The determinations of acetylene were made as follows : The 

 gas to be tested was passed into a eudiometer through a stop 

 cock at the top of it. The acetylene was absorbed by an 

 ammoniacal solution of cuprous chloride and the ammonia was 

 finally washed out with water. The temperature and pressure 

 of the gas remaining after the absorption of acetylene was 

 made the same as before. This method is applicable only in 

 absence of oxygen and carbonic oxide. The latter will be 

 present when the acetylene exploded was mixed with water 

 vapor or oxygen. Repeated tests for carbonic oxide failed to 

 show the presence of that gas in the products of the acetylene 

 exploded. 



Experiment 36. — Gas, 99 per cent of acetylene; pressure, 

 2 atmospheres. The explosion was prompt. It extended 

 through a brass tube l|- mra in diameter and 1 meter in length to 

 the manometer. The determinations of acetylene in the 

 residual gas gave 4, 4*3 and 3*7 per cent. 



* This Journal, vol. ix, 5. 



Am. Jour. Sci.— Fourth Series, Yol. X, No. 58.— October, 1900. 

 20 



