OLDENBUSCH: STIMULATION OF PLANTS 381 
TABLE II 
AVERAGE GROWTH IN MILLIMETERS OF THREE HYPOCOTYLS OF Vicia Faba 
SEE ee, PLACED IN NUTRIENT SOLUTIONS CONTAINING TO 
F FOLLOWING CONCENTRATION, EACH EXPERIMENT 
COMPRISING TWELVE SEEDLINGS 
M/2,000 M/4,000 M/6,000 M/8,000 M/20,000 M/40,000 Control 
Exp. A 
Ist day 58 6.5 13.0 13.7 7.0 
2nd 2:2 5.4 11.7 16.1 9.5 
Total 74 11.9 24.7 29.8 16.5 
Vv! 3.8 6.0 12.4 14.9 8.3 
Exp. B 
Ist day 18.2 18.2 22.7 22.9 17.8 18.9 
and,“ 19.4. 23.4 21.6 21.0 16.2 19.6 
ad 21.4 19.0 19:7" 15.8 8.1 14.4 
4th “ 19.2 19.2 23.5 17.0 17.7 16.3 
Total 78.2 79.8 87.5 76.7 59.8 69.2 
Avg 19.6 20.0 21.9 19.2 15.0 1.4 
Bap © 
Istday 16.6 14.6 13.6 73.7. 147 16.6 19.3 
Hid: 10.5 16.0 18.7 21.8 21.6 16.0 17.5 
grat 14.1 18.4 18.0 29.0 26.7 15.5 19.7 
Total 41.2 49-0 50.3 64.5 63.0 48.1 56.5 
vg £3.77 16.3 16.8 21.5 21.0 16.0 18.8 
Exp. D 
Ist day 9.5 16.8 10.8 20.0 39.0 1.5 19.8 
2nd ‘ 7.0 11.5 II.0 18.0 12.5 11.0 16.5 
aa: * 8.0 14.0 12.9 24.5 18.5 13.2 17.0 
Total 24.5 42.3 34.7 62.5 70.0 25.7 53-3 
Avg. 8.2 14.1 11.6 20.8 23.3 6 17.8 
Total average of the four experiments (i.e. twelve examples). 
19.6 13.2 15.6 
TABLE II shows a distinct stimulation in the growth of 
hypocotyls of Vicia seedlings, in the M/6,o00 to M/20,000 CS, 
solutions, the average greatest stimulation being in the M/8,000 
dilution, although the M/20,000 shows a greater acceleration in 
some instances. In the M/40,000 concentration, the CS, content 
has become so dilute that it no longer has any effect on growth. 
In the higher concentrations, the M/6,o00 solution caused a 
marked stimulation in Exp. A and B, stained in other cases 
