130 Dr. G. Gore on the Reality of 



has the former, and also metaphosphoric from analogy and 

 from its formation of dimetaphosphates, 



O-P-OOH 



I I 9 



O-P-OOH 



the acid of which is unknown ; and more complex compounds 

 of similar type. 



Of the lower oxacids of chlorine and nitrogen, chlorous and 



/OH /OH 



nitrous, N\q and C1 x q , are feeble acids, though forming 



stable metallic compounds ; whilst hyponitrous and hypoehlo- 



.TT ,TT 



rous may be N^q and OI^q, and so are scarcely acids at all. 



The latter may however contain univalent chlorine, and be 

 Cl-OH. 



XVII. Evidence respecting the Reality of u Transfer-resist- 

 ance " in Electrolytic Cells. By G. Goke, LL.D., F.R.S* 



IN a paper published in the i Proceedings of the Royal 

 Society/ 1885, no. 236, vol. xxxviii. p. 209, 1 have stated 

 that " a species of electric-resistance, distinct from that of 

 polarization and ordinary conduction-resistance, varying 

 greatly in amount in different cases, exists at the surfaces 

 of mutual contact of metals and liquids in electrolytic and 

 voltaic cells," and " this resistance varies largely in amount 

 with different metals in the same solution, and with the same 

 metal in different solutions." 



As conduction-resistance is attended by evolution of heat, 

 I took advantage of this fact to search for a difference of 

 temperature produced by " transfer- resistance " at the sur- 

 faces of different metals in the same solution, and I now 

 employ the same fact in a somewhat different way to search 

 for difference of heat evolved at the surface of the same 

 metal in different liquids. I use an air-thermometer instead 

 of mercurial ones, and make an experiment like that of 

 Peltier's, but employing a metal and electrolyte instead of 

 two metals. 



I took a thin platinum bottle, of a conical shape, of 10*0 cm. 

 total height, 50 cm. in diameter at the bottom, and 1*25 cm. 

 diameter at a height of 8*5 cm., at the bottom of the neck. 



* Communicated by the Author : read before the Birmingham Philo- 

 sophical Society, January 21st, 1886. 



