RECORD OF THE EXPERIMENTS. 
bo 
Or 
M nt) Mi 
: : i 9 2). slic r hene- 
Mg +55 000° a and in 50,000° a (figs. 12 and 13); the slightly bene 
Re cng: M | ae M 
ficial effect of 50,000¢2 and the markedly harmful effect of 50.000 
Mg, as contrasted with distilled water, (Figs. 14, 15, and 16.) 
Fic. 13.—Seedlings of culture 12, experiment 3, 
EXPERIMENT 4. 
The series of culture solutions embraced in experiment 4 was 
identical with that of experiment B. Duration, 8 days; temperature 
at beginning and-at end, 23.5°; stages of development as in experi- 
ment A. (PI. I.) 
231 
