386 Dr. L. Bleekrode on the Electric Conductivity 

 Table (continued). 



Compound. 



Galvanic battery. \ Induction-coil. 



20 B. el. 



80 B. el. 



Spark-length 

 = 15 millims. 



Spark-length 

 = 70 millims. 



Phenylamine 10 , H ^N 

 H J 



Diphenylamine 11 , C 6 H 5 \ N 

 H J 



Ethylaniline 12 , CgHg In 

 H J 



Naphthylamine 13 , H IN 

 H J 



o 

 D=0 



D=0 



D=0 

 D=0 



Trace. 



Trace. 

 D = 



No action. 



Spark-discharge ; 

 electrodes 1 mm. 

 apart. 



Spark-discharge. 



D=0°. 



No action. 



No conduction. 



10 Distance between the electrodes =1 millim. 



11 Substance fusible ; on the discharge, separation of carbon. 



12 Bright-green sparks pass ; distance of electrodes = 2 millims. ; separation 



of carbon. 



13 Fusible ; electrodes 3 millims. apart ; no discharge. 



To this series belong two condensed gases only — the am- 

 monia and the methylamine ; the other substances are either 

 liquid at ordinary temperatures or fusible without decomposi- 

 tion. Definite electrolysis takes place with ammonia, ethyl- 

 amine, and methylamine, as even the discharge of 5 Bunsen 

 elements is followed by a polarization-current. The com- 

 pounds in which the alcohol-radical has replaced more than 

 one atom of H (di- and triethylamine &c.) exhibit a dimi- 

 nution of conducting-power, which may be in accordance 

 with the weakening of the capability of chemical reaction. 

 Thus, in the secondary and tertiary amines the basic pro- 

 perties are less, the solubility diminished, &c. The phenyl- 

 amine (aniline) series comprises very bad conductors; and, 

 indeed, induction-sparks of 70 millims. will not strike through 

 naphthylamine . 



The chemical behaviour of these bodies in respect of easy 

 exchange of hydrogen for metals is not always in accordance 

 with their conductivity. In phenylamine, for example, hy- 

 drogen is directly expelled by potassium, copper and mercury 

 compounds form at the ordinary temperature by elective affi- 

 nity ; while with gaseous ammonia the exchange of hydrogen 

 for potassium and sodium, and also for silver, tak^s place only 

 on the temperature being raised ; and in the liquid state its 



