Metals and Plants. 
465 
The shoot was measured to the tip of the longest leaf. The 
roots of the oat were less inclined to become discolored than 
those of the lupine. Roots dead under the influence of silver, 
thallium, zinc, lead, antimony, and bismuth were white; and 
cobalt and cadmium only gave them a dirty appearance. Man¬ 
ganese colored them yellowish, and tellurium pale brown. The 
alkalinity caused by magnesium was equal to 4.2 c.c. N. per 
liter; by zinc, to 0.05 c. c. N. per liter. In its general and most 
striking features, this table is like those given for Lupmus. 
* Table V. 
Soja hispida. Dec. 19, 2 P. M. Part of same vessels 
and metals as in experiment II. 
GROWTH IN MM. 
Metals. 
Dec. 20. 
Dec. 21. 
Control. 
9.5 
14 
Au. 
9 
13 
Pt .. 
6 
9 
Ag. 
5 
5 
Brownish. 
A1. 
6 
10 
Cu. 
0.5 
0.5 
Greenish-brown. 
Ni. 
11 
16 
Co. 
0.5 
0.5 
Discolored, flaccid. 
Fe. 
1.5 
4.5 
Cd. 
0.5 
0.5 
Flaccid, tip yellowish. 
T1. 
0.5 
0.5 
Glassy. 
Pb. 
1.5 
1.5 
Zn. 
0.5 
0.5 
Yellowish. 
Hg. 
5.0 
5 0 
The seedlings were not as uniform nor robust as was desir¬ 
able, and the experiment is reported only to show that the same 
metals that killed Lupinus kill Soja: in addition to these, sil¬ 
ver and mercury seem to have been deadly. 
