Peters and Moody — Determination of Persulphates. 373 



volume of 100 cm3 was destroyed by thiosulphate. ISTo more color 

 appeared on standing. The results of these experiments are 

 given in section A of Table Y. In section B of Table Y are 

 recorded experiments in which the mixtures were allowed to 











Table V. 





















After 













(NH 4 ) a S 2 8 



standing 













calculated 



the number 













from iodine 



of hours 



Ammonium 





Volume 



Time 



Atmos- 



found 



indicated in 



persulphate 





of 



of 



phere 



11 hours 



the fourth 



solution. 



KI. 



liquid. 



standing. 



above 



standing. 



column. 



cm 3 . 



grm. 



cm 3 . 



hrs. 



liquid. 



grm. 



grm. 



12-5 



l'O 



25 



26 



aii- 



0-1203 



0-1203 



12-5 



1-0 



25 



26 



air 



0-1196 



01190 



12-5 



1-0 



100 



26 



air 



0-1191 



0-1207 



12-5 



10 



100 



26 



aii- 



0-1190 



0*1209 



f 12-5 

 J 12-5 

 J 12-5 

 [l2'5 



1-0 



25 



B 

 20 



air 





0-1211 



1-0 



25 



24 



aii- 







0-1213 



1-0 



100 



20 



air 







0-1211 



1-0 



100 



24 



air 







0-1211 





' 



1-0 



100 



24 



co 2 







o-oooo 





12-5 



j-e 



25 



20 



co, 







0-1216 



* 



12-5 



1-0 



25 



25 



CO, 







0-1214 





12-5 



1-0 



100 



20 



CO, 





0-1212 





12-5 



1-0 



100 



24 



CO, 







0*1217 









C 



H,S0 4 1 : 1 















cm 3 . 





( 12-5 



1-0 



25 



25 



air 



1-0 



0-1248 



•] 12-5 



1-0 



100 



24 



air 



1-0 



0-1220 



( 12-5 



1-0 



100 



24 



air 



1-0 



0-1226 



j 12-5 



1-0 



25 



17 



co, 



0-05 



0-1217 



( 12-5 



l'O 



25 



24 



CO, 



0-05 



0-1212 



j 12-5 



1-0 



25 



17 



co, 



1-0 



0-1222 



( 12-5 



1-0 



25 



23 



co, 



1-0 



0-1223 



j 12-5 



1-0 



100 



17 



co, 



0-05 



0-1214 



\ 12-5 



1-0 



100 



24 



co, 



0*05 



0-1214 



( 12-5 



1-0 



100 



17 



co, 



1-0 



0-1214 



1 12-5 



1-0 



100 



24 



co, 



1-0 



0-1219 



f 12-5 



1-0 



100 



23 



CO, 



1-0 



0*1220 



j .... 



1-0 



25 



20 



air 



1-0 



00014 



j.... 



1-0 



100 



20 



air 



1-0 



0-0006 



j .... 



1-0 



25 



24 



co 2 



1-0 



0-0011 





1 .... 



1-0 



100 



24 



CO, 



1-0 



0-0003 



