442 Dr. L, Bleekrode on the Electric Conductivity 



Table VII. 



Compounds. 



Galvanic 

 battery. 



Induction-coil. 



Spark-length 

 = 15 millims. 



Spark-length 

 =70 millims. 



20B.e. 



80B.e. 



Diethyl 1 , (C 2 H 5 ) 2 

 Ethvlic chloride, C 2 H 5 CI 

 Ethylic iodide 2 , C 2 H 5 1 



Ethylic sulphide 3 , (C 2 H 5 ) 2 S 

 Ethylic bromide 4 , C 2 H 5 Br 



Ethylene bichloride, C 2 H 4 Cl 2 



Ethylene bromide, C 2 H 4 Br 2 

 Mercaptan 5 , C 2 H 5 SH 



D 



0° 

 2 



Trace. 



Trace. 









 



D 



2° 

 3 

 2 

 (G=0) 



2 

 2 



3 



(G=0) 







O 



D=2 



o 

 D=10 



Spark-discharge. 

 Strong heating ; 

 iodine separated. 



No effect. 



D=5 



D=20 

 Brisk efferves- 

 cence. 

 Spark-discharge. 



Traces of conduc- 

 tion. 



Dimethyl 6 , (CH 3 ) 2 

 Methylic iodide?, CH 3 T 





 4 









D=4 



Brisk efferves- 

 cence. 

 D=5 

 Spark-discharge. 



Much heat evolved. 



Amylene 8 , C 5 H l0 

 Amylene bromide, C 5 H l0 Br 2 

 Amylic chloride 9 , C 5 H n CI 

 Amylic bromide 10 , C 5 TL : x Br 

 Amylic iodide 11 , Cs H n I 

 Amylic sulphide 12 , (C 5 H u ) 2 S 

 Amylic alcohol 13 , C 5 H u H 







2 





 











4 



4 



4 



(G=0) 















D=0 



No effect. 

 D=0 



D=4 



Spark-discharge. 

 D=0 



D=0 



D=0 



No sparks. 

 No effect. 



Spark-discharge. 



D=15 



Spark-discharge. 

 D=30 



D=6 



D = 10 



Spark-discharge . 



1 A thick mist appears, and effervescence ; no spark-discharge. 



2 Distance between electrodes = 1 millim; 



3 Spark-discharge ; liquid coloured yellow ; spark green. 



4 Decomposition by induction-current ; liquid becomes yellow. 



5 A single spark now and then passes. 



6 No spark-discharge. 



7 Liquid grows very hot through the discharges, but is not coloured. 



8 Sparks green-coloured. 



9 Discharge turns the liquid black. 



J0 Effervescence ; liquid turns yellow. 



11 Much iodine separated at the discharge. 



12 Electrodes 3 millims. apart; undulations of the liquid, and vibration of the longer 



electrode. 



13 Lapschin and Tichanowitsch found some conductivity with 900 B. e. and the elec- 



trodes 1 millim. apart. 



