1908-9.] Hydrolysis of Balts of Amphoteric Electrolytes. 
661 
For one set of experiments the method of Walker and Robertson* was used. 
About 80 c.c. of distilled water were cooled to zero in a Dewar bulb 
surrounded by a jacket of ice and water. The mouth of the inside vessel 
was closed by a rubber stopper with three holes, for the thermometer, 
stirring tube, and filter tube respectively. A block of ice was frozen from 
distilled water and then planed finely. 50-60 grams of this wet ice were 
put into the cooled water in the vessel and the apparatus closed. When 
the zero of the thermometer had been determined, the water was siphoned 
off by the filter tube without moving the thermometer, and the same 
quantity of solution cooled to zero was introduced through the stirring 
tube and rinsed down with cooled distilled water. When the mercury was 
again steady, the solution was filtered off and analysed. 
Hydrochloric Acid : — 
Concentration. 
Depression. 
Depression calcu- 
lated for *05 1ST. 
•05359 N. 
•1935° 
•1805° C. 
•03954 
•1410 
For *04 N. *1427° C. 
Anthranilic Hydrochloride : — 
Concentration. 
Depression. 
Hydrolysis. 
hb 
K’ 
•04891 N. 
•195° 
•2033 
394 
•05545 
•218 
•1735 
495 
•04282 . 
•173 
•2335 
328 
A variation of this method was tried by adding a few c.c. of concentrated 
solution to the water instead of siphoning it off and adding dilute solution. 
Hydrochloric Acid : — 
Concentration. 
Depression. 
Depression 
for ‘05 FT. 
•0494 N. 
•1725° 
•1756° 
•05417 
•190 
•1772 
•0562 
•194 
•1728 
•0619 
*213 
•1721 
* Proc. Roy. Soc. Edin ., vol. xxiv. p. 363. 
