462 
Copeland and Kahlenberg. 
Table III. 
Lupinus albus. Dec. 22, 3 P. M. Same conditions, except that the t con- 
trol plants, four in number, were selected seedlings, likely to exceed 
the average growth, under the same conditions. 
GROWTH IN MM. 
Metals. 
Dec. 23. 
Dec. 24. 
Dec. 26. 
Dec. 29. 
Dec. 31. 
Control. 
6.5 
15.5 
37* 
52 
54 
Au. 
7 
15 
34 
48.5* 
49 
Pt. 
11 
18 
34 
39.5* 
42 
Pt Cl-t-trace. 
5 
10 
29* 
41 
42.5 
Pt Cl 4 -faint trace... 
6.5 
10 
30.5 
48* 
51 
Pd. 
9.5 
13.5 
32 
41.5* 
42.5 
Pd (NO 3 ) 4 -trace ... 
1 
1 
Ag. 
10 
13 
29* 
44.5 
48 
A1.. 
7 
11.5 
34.5 
60* 
66 
Cu. 
11 
11 
0-10 
0-17 
0-20 
0-20 
Cu wire, 1 cm. 
5-6 
10-12 
33-35 
38-55 
38-56.5 
Ni ..... .. 
5.5 
10 
19 (dead) 
29.5* 
30.5 
Co, tt . 
8.5 
8.5 
Sn. 
3 
7(dead) 
15 
22 * 
25 
Fe... 
3 
4.5 
40 
Cd... 
4 
3.8 
T1. 
2 
2 
ivory white 
except at tip 
Pb. 
2 
7 (dead) 
15.5 
15 
Pb C0 3 . 
2 
2 
Zn. 
6 
6 
Mg. 
2.5 
2.5 
Sb. 
7 
10 
11.5 
11.5 yellow 
Bi..... 
3.5 
9 
14.5 
40* 
42.5 
C. 
14 
22 
46* 
79 
85 
Hg..... 
7 
10 
22 
32 
32.5 
Ru. 
6 
16.5 
44 
59* 
59.5 
Mn.. 
6 
8 
11 
15 
14.7 
Rh. 
5 
11 
24* 
34 
37 
Cr... 
8 
14 
29 
38.5* 
38.5 
In. 
4 
9 
38 
59 
64 
W. 
5 
18 
40 
42* 
42 
Te. 
7 
15 
31 
35 
35 
Se. 
5 
13.5 
31 
46* 
50.5 
B. 
9 
23 
77 
139* 
14 
* 
The asterisk * marks the time when the development of lateral roots 
first seemed likely to affect the growth of the tap root. 
