of Chemical Action. 421 



of six each, at various times during the course of the work, 

 •which lasted about two weeks, the first batch at the commence- 

 ment and the fourth at the finish. The mean values obtained 

 were: — 



temp. 21° C, 



Means 



or the equation for the blank experiment, 

 y(113-02+*)= 1113*2. 



The following Table contains the mean values for these same 

 constants from two and, in some cases, four experiments, and 

 the weight (calculated as anhydrous) of the various salts pre- 

 sent in each:— 



Table I. Temp. 21° C. 



a. 



b. 



113-8 



1113-8 



112-9 



1112-5 



112-4 



1110-8 



113-0 



1115-7 



113-02 



1113-2 



Weight 

 of salt. 



K 2 S0 4 . Na 2 S0 4 . (NH 4 ) 2 S0 4 . 









i 





a. 



b. 



a. 



b. 



a. b. 



2 grams . . . 



134-5 



1340 1 134-8 • 



1343 



134-3 



1345 



3 „ ... 



145-5 



1456 146-5 



1464 



147 



1473-7 



4 „ ... 



159-6 



1592-7 



159-5 



1595-5 



161-5 



16184 



5 „ •• 



170-5 



1708 



167-7 



1691 



171-2 



1725 



6 



185-3 



18604 



184-3 



1853-7 



184-9 



1850 



8 „ ... 



214 



2180-5 



210-8 



2i 20-3 



212 



2150-7 



10 „ ... 



243-1 



2468-6 



233-5 



2365 



235 



2381-3 



Weight 

 of salt. 



KA1(S0 4 ) 2 . 



(NH 4 )A1(S0 4 ) 2 . 



i , 







a. o. 



a. b. 



2 grams... 



126-6 1249-3 



127-8 1244 



3 ., ... 



133-3 ; 1315-4 



133-4 1316-6 



4 



140-6 



1387-6 



139-7 13845 



5 ., ... 



144-8 



1442-5 



145-5 1444-5 



6 „ ... 



154-7 



1537-5 



154 1529-4 



8 „ ... 



163-7 



1627-8 



160-9 1608-8 



10 „ ... 



173-4 



1727-5 



171-7 1704-5 



Weight 

 of salt. 



MgS0 4 . 



ZnS0 4 . ] 













a. 



b. 



a. 



b. 



2 grams . . . 



128-5 



1278-5 



- 123-8 



1225-6 



3 „ ... 



139-1 



13754 



129-8 



1280-3 



4 „ ... 



144 



1429-5 



131-5 



1308 



5 „ ... 



149-5 



1492-2 



138 



1369-5 



6 „ ... 



156 



1569-4 



141-6 



1414-3 



8 „ ... 



168 



1680-1 



147 



1477 



10 „ ... 



179-2 



1793-5 



155 



1540-3 



