JENSEN—TOXIC LIMITS AND STIMULATION 
1907] 
TABLE V 
PB(NO3)2 SERIES IN SOLUTION. FEBRUARY 2-17. 1906 
H.O n n n 2n 4n 6n 8n _% | am | 4n 
i 10000 | 5000 | 1000 | 1000 | 1000 | 1000 | 1000 | 100 | 100 | I00 
Av. length of sprout, cm.| 10.5 | 12.47 | 11.3 <2 | 10.4.) 9-75] 8.315 | 8.0 |8.08] 7-3 | 5-3 
Total transpiration, gm..| 11.6 | 12.30| 12.50| 11.6 | 11.1 | 9.90| 9.2 9-7 |9-7 | 7-9] 7-0 
Nee green weight, mg..| 670 25 | 640 | 620 | 585 |} sgo | 523 | 520 | 476] 445 | 408 
otal dry weight, mg....| 85 905 84 80 79 17 78 | 75 7 72 | 70 
eT 
H.0 N 
n/ 0000 \ \ 
H.O — 
n/' 5000 i. ay \\ ; 
cs, n/ 10000 - 
n/ t000 st a 1 
S\ ) Ey 
“ n/ 5000 Is : 7 
2n/t000 / ji 
AY n/ 1000 T Z| 4 
3n/t000 \\ — ie } 
; ¥ ‘ 2n/ 1000 ! - u 
5/1000 \ ‘ i Ff Hl 
on \ ‘ 4n/1000 += 
7/1000 aN i 
WZ 6n/ 1000 + T 
7, ‘ 
9/1000 LD: i 
Aft ey, : poised 
Pd Vi on/ TO0° ae | 
n/ too = 2 #. WA 3 | } 
5 2 
= as n/ 100 j oe 
22/100 ee es Sorel ; ! Vi, 
. ee: i ee Lk 
3n/t00 4 A 
Y a / |e 
7 <3 3n/100 
a) 5 Io 15 
4n/ 100 WA nee Io 15 
Ce 10 15 20 BR eae 400 600 
eatigee =i 30 50 70 90 oesam 65 85 105 
a 350 650 te} 1250 a 
ios 7 = re 160 Fic. 12.—Lead nitrate 
Fic. 11.—Lead nitrate. Average of three series in solution. Feb. 2-17. 
. Si. 1906. 
SILVER NITRATE 
The experiments with silver nitrate were repeated three times. 
Figs. 14, 15 are taken from the first one. The results of the cificrent 
tests correspond quite closely, hence only the averages are here 
given in Table VI and graphically in jig. 13- 
