58 



W. G. Mixter — On Electrosynihesis. 



was 3*9 CC and was found to be chiefly oxygen. This excess of 

 oxygen may be due to leakage of the mixed gases from the gas- 

 holder during the time intervening between the first and last 

 experiment. In the three experiments 47 # 7 CC of hydrogen and 

 oxygen and 67'9 CC of methane and oxygen combined, or in the 

 ratio of 1 to 142. The ratio in the successive experiments is 

 1 to 1*49, 1 to 143, and 1 to 1*36. The smaller ratios for 

 methane and oxygen in the last two are explained by the 

 presence of an excess of oxygen. 



Ethylene and Oxygen, 



The ethylene used was made from ethylene bromide by 

 means of a zinc-copper couple and was nearly pure. 



, 



Hydrogen, 2 volumes. 





Ethylene, 5*2 c. c. 







Oxygen, 



1 







Oxygen, 19'1 c. c. 















c. c. of 1 



c. c. of 











Hours. 



Temp. 



Pres- 



Observed 



Reduced 



gas 



gas 



Reduced 



Observed 



Pres- 



Temp. 



sure. 



volume. 



volume. 



com- 



com- 



volume. 



volume. 



sure. 













bined. 



bined. 













12-8 



126-5 



138 



22 







24-3 



138 



140 



13-3 



2 



13-7 



975 



134 



16-4 



56 



12'4 



11-9 

 *6 



Ethylen 

 Oxyge 



128 



124 



e, 1 vol 

 a, 3 vol 



74 

 39 



ume. 

 umes. 



14 

 18 





16 



131 



137 



22 3 







25-3 



140 



145 



16 



2 



13 



76 



129 



12-3 



10 



185 



6-8 

 *5-2 



Ethylen 

 Oxvgen, 



126 



125 



e, 1 vol 

 2-5 vol 



43 

 33 



ume. 

 umes. 



13 

 14 





16-6 



101-8 



137-5 



17-4 







211 



140 



121-3 



16 



1 



17 



80 



134 



13-3 



41 



12*5 



8-6 

 *0-7 



130-5 

 124 



53 



4-7 



16-6 

 20 





16*8 



82 



131 



13-3 







19-1 



136 



113 



16*2 



1 



17-8 



62 



128 



9-8 



3'5 



10*7 



8-4 



128 



53 



17-8 



Three volumes of oxygen are required for the complete oxi- 

 dation of one volume of ethylene, but in none of the experi- 

 ments was the gas all oxidized to carbon dioxide and water. In 

 the first experiment with an excess of oxygen 2*5 volumes dis- 

 appeared to one of ethylene. The residual gas, 5*2 CC , of the 

 second experiment was found to be oxygen. The combination 

 of ethylene and oxygen in the third was very nearly in the 

 proportion of 1 to 2*5 volumes. Doubtless some acetic acid 

 was formed, as no oxalic or formic acid was found in an experi- 

 ment made especially to determine whether these acids were 

 formed. The results of the second experiment except as above 



* Residual gas. 



