1904] On Liquefied Hydrides as Conducting Solvents. 



453 



Hydrobromic Acid. 



T 186-8 188-8 190-8 193*7 197-3 199-4 



v 0-911 0-902 0-890 0-877 0'857 0*851 



drf/dT = 0-57. 



Hydriodie Acid. 



T 223-3 225-6 227"2 230-6 231-5 233-9 236'4 



r, 1-479 1-454 1-437 1-426 1-402 1-377 1-353 



drj/dT = 0-70. 



Sulphuretted Hydrogen. 



T 191-0 193-3 198-2 201-2 206'1 209-8 



r} 0-547 0-528 0-510 0*488 0-470 0-454 



drj/dT = 1-10. 



5. — Solubilities and Conductivities. 



Of the substances examined at this stage, the organic ammonium 

 salts were found to be readily soluble, and to give conducting solutions. 

 Some doubt existed as Lo whether any metallic salts were dissolved ; if 

 so, none were found to conduct the current. The only readily soluble 

 inorganic substances were hydrogen chloride and bromide dissolved in 

 sulphuretted hydrogen. It is somewhat remarkable that these solutions 

 are perfect non-conductors. 



The conductivity of a few substances was accurately determined ; 

 as, for instance, that of solutions of triethyl ammonium chloride in 

 hydrogen bromide and sulphide. It was found that the molecular 

 conductivity of these two solutions, and of all the others which were 

 examined, increased enormously with increasing concentration, instead 

 of showing a slight decrease, as in the case of aqueous solutions. 



The further study of the solubilities and conductivities forms the 

 subject of another paper. * 



* Infra, p. 454. 



