W. G. Mixter — On Electrosynthesis. 



59 



stated are worthless, because the action of the discharge was 

 not stopped until the ethylene was nearly all consumed and 

 there was a large excess of oxygen present. The first experi- 

 ment shows a ratio of the hydrogen and oxygen consumed in 

 two hours to ethylene and oxygen of 5*6 to 12 , 4 CC or as 1 to 

 2*2, while in the last two the ratio is 1 to 3. The slower rate 

 of combination of ethylene and oxygen in the first case is to 

 be ascribed to the excess of oxygen present. 



Acetylene and Oxygen. 



The acetylene used in the following experiments was made 

 from calcium carbide and kept over water. It proved to be 

 nearly pure. 





Hydrogen, 2 volumes. 





Acetylene, 4*8 c. c. 





Oxygen, 



1 







Oxygen, 15*7 c. c. 













c. c. of 



C. C. of 











Hours. 



Temp. 



Pres- 



Observed 



Reduced 



gas 



gas 



Reduced 



Observed 



Pres- 



Temp. 



sure. 



volume. 



volume. 



com- 



com- 



volume. 



volume. 



sure. 













bined. 



bined. 













17-4 



121 



139 



20-8 





20-5 



137 



121 



17-4 



1 



152 



101 



135 



17 



3'8 



11 



9-5 

 3-3 



Acetyle 

 Oxyge 



129 

 123 



ne, 6-3 



n, 177 



59 

 22 



c. c. 

 c. c. 



15-2 



19 





10-5 



100 



136 



17-2 







24 



1405 



135 



105 



1 



14 



74-5 



133 



12-4 



4-8 



13*1 



10-9 



Acetyle 

 Oxyge 



1305 



ne, 8-2 

 n, 18-4 



66-5 



c. c. 

 c. c. 



14 





16-2 



124-4 



140 



21-6 







266 



142 



151 



16 



1 



162 



1017 



137 



17-3 



4*3 



139 



12-7 



Acetyle 

 Oxyge 



132 



ne, 1 vo 

 n, 2 '5 vo 



77-7 



lume. 

 lumes 



17 





16-5 



133 



139 



22-9 







26-7 



142 



152 



17 



1 



15-4 



108-7 



135-4 



18-3 



4*6 



146 



12-1 



0-7 



131 

 123 



74 

 4-7 



15-4 



18 



In the first experiment the oxygen consumed was 15 # 7— 3*3 

 = 12*4 or 2*58 times the acetylene taken. In the last experi- 

 ment the acetylene and oxygen were in the proportion 

 required for complete oxidation of the former, and of the 26*7 CC 

 of gases taken only 0"7 cr ' remained. The results show that 

 acetylene in presence of sufficient oxygen is all converted into 

 carbon dioxide and water by the glow discharge. 2*9, 2*7, 3*2, 

 and 3*2 cubic centimeters respectively of acetylene and oxygen 

 combined to 1 of hydrogen and oxygen. The lower results in 

 the first two are evidently due to the excess of oxygen present 

 in the mixtures. 



