99 ABSORPTION AND EXCRETION OF SALTS BY ROOTS. 
TABLE I].—Statement of results, experiment 2. 
Number of culture............2.2-2--- Laan 2 3 4 5 6 7 
Concentration: i 
Poe ete acrciinct aul 80) 9 : mM | om | 4m | 6m | 8m | 10M 7 
3 500, 900 | 500,000 | 500,000 | 500,000 | 500,000 | 500,000 : 
Atiber Zidearyiss maemo eter ty) 2s 12M | OT EN OM eM | 6M | em i 
500, 000 | 500,000 | 500,000 | 500,000 | 500,000 | 500,000 | 500,000 4 
500, 000 | 500,000 | 500,000 | 500,000 | 500,000 | 500,000} 500,000 
wer 
INumberiolculttresss--eeeso eee 8 9 10 11 12 13 14 : 
Concentration: ; 
ne 12M | 14M | 16M | 18M | 20M | 22M 24M 
elore growth..-.....-.-..-+.---.- 500, 000 | 500,000 | 500,000 | 500,000 | 500,000 | 500,000 | 500, 000 . 
i 
- 5M 6 M 6M 6M 8M 6M 11M 4 
After 7 days. ..--..-.----+-+++-++-- 500,000 | 500,000 | 500,000 | 500,000 | 500,000 | 500,000 | 500,000 ; 
8M | 8M 9 M 8M 8M 7M 7M - 
After 14 days.-.......-..------+--- 500, 000 | 500,000 | 500,000 | 500,000 | 500,000 | 500,000 | 500, 000 
500,000 
(E10 
500,000 
10/7 
400,000 
CHANGE IN CONCENTRATION DURING GROWTH. 
3/7 fi 
500,009 
/ 
/ 
oe bof e| ie | 
—45/7 
500, 000 
Fic. 10.—Curves showing relation of initial concentration of culture solutions to a and excre- 
tion of salts during growth in solutions of Ca(NOs)2 grading py increments of 500 000 from distilled 
24M 
AF see 
ee /5 00000 
231 
