190 liquid hydrogen sulphide as an ionizing medium 



Reactions in the Liquid Sulphide. 



Small quantities of the solute were put into the liquid, 

 stirred, and the conductivity measured with a dip electrode. 

 The following results were obtained: 



Iodine immediately dissolved forming a beautiful reddish 

 purple solution. It showed a relatively high conductivity. 



Sulphur dioxide, made from sodium sulphite and dried 

 with phosphorus pentoxide, was passed through the liquid. 

 No visible reaction took place. A reaction, however, occurred 

 in the gas phase, since sulphur was deposited. The solution 

 did not conduct. 



Diphenylamine and phenyl hydrazine were very soluble, 

 but the liquids possessed no conducting power. 



Urea and brucine were slightly soluble. The solutions 

 did not conduct. 



Meta-phenylenediamine chlorhydrate and glycocoU were 

 either insoluble or only slightly soluble. The solutions showed 

 no conductivity. 



Tripropylamine and iso-tributylamine were very soluble 

 and formed good conducting solutions. They were further 

 examined. 



Phosphorus tri- and pentachlorides were soluble but gave 

 no conduction. 



Hydrogen chloride and iodide were easily soluble in the 

 liquified sulphide. The former conducted very slightly. 



Freshly distilled antimony chloride was quite soluble, but 

 reacted with the solvent. It gave a good conducting solution 

 and will be referred to later. 



The conductivity apparatus consisted of an ordinary 

 Wheatsone bridge system with a Leeds and Northup potentio- 

 meter as the slide wire. A microphone hummer and a special 

 telephone proved very satisfactory. A Dewar flask with solid 

 carbon dioxide as a refrigerant served as a constant temperature 

 bath. 



The conductivity cell was of the form shown in the diagram 

 (Fig. I). The electrodes were platinum, about one centimeter 

 square, and were three millimeters apart. They were platinized 

 in the ordinary way. 



