568 Williams. — On the Influence of Immersion in cei r tain 
Table II. 
K 2 Cr 2 0 7 . Temperature 25° C. Temperature error 1 per cent. 
Concentration and Time of Immersion needed to produce precipitate. 
Concentration 
in gram-mols. 
per litre. 
Date. 
Time needed 
in hours. 
Average 
time. 
LogT. 
Log 6 + 1 
Value of 
Log T+ 0-67 
(Log C+ 1). 
1919. 
0.108 
Feb. 28 
1-75 
1.6 
0-204 
0-033 
0-23 
Feb. 28 
1-5 
March 7 
1-66 
0-072 
April 4 
2.16 
2-08 
0-318 
1-837 
0.21 
April 4 
2 
0-054 
March 12 
2-5 
2-66 
0-425 
1-73 
0-24 
March 13 
2-75 
March 27 
2-75 
0-036 
March 28 
3-25 
3-33 
0-522 
1.536 
0-23 
April 3 
3*25 
April 3 
3.5 
Average value of constant in last column - 0-23. Maximum deviations rom average = +4% 
- 8 % 
