458 
Copeland and Kahleriberg. 
Table I. 
Preliminary experiment. 
Zeo Mais. Nov. 15, 5 P. M. Radicles 1.5-2 cm. long. 
GROWTH IN MM. 
Metal. 
Abba. 
Nov. 17. 
Nov. 19. 
Nov. 22. 
5 P. M. 
2 P. M. 
11 A. M. 
Cu. 
550 sq. cm. 
0 
Tip green; shrunken, 
brown above. 
Ni. 
550 
0 
Tip greenish; some 
what shrunken above. 
Sn. 
550 
25 
50. 
70. 
Ag. 
200 
0 
Dirty. 
Brownish. 
Pt. 
75 
10 
20. 
Curled up. 
Au. 
98 
18 
25. 
40. 
Hg. 
19 
6 
9. 
Coiled tight. 
Sb. 
92 
20 
30. 
40, dirty. 
Bi... 
114 
5 
5. 
Brownish. 
Co. 
69 
0 
Collapsed, flaccid, 
tawny. 
Cd. 
33 
0 
Tip reddish-brown. 
Fe. 
195 
5 
5. 
Rust-brown. 
Zn. 
40 
0 
Brown, with purplish 
tinge. 
A1. 
160 
10 
20. 
35. 
Pb. 
47 
0 
Dirty and gla ssy look 
ing. 
Control. 
i. 
20 
40. 
70. 
The silver and platinum were probably impure, and such a 
growth in the presence of antimony was not found again in any 
later experiment. 
