404 BOTANICAL GAZETTE | DECEMBER 
5. With NaNO, instead of Ca(NO,). (‘‘isotonic”’ quantities). 
length a ag 26°" 2g" 
Stem 1 turgor 2.5% 3% 3% 
length is —- aa™ 
ss turgor 2% 2% 2-2.5 % 
The beans without K flourished as well as those with it until 
almost the end of the experiment. As the plants become older 
and irregularly branched, and in many cases the main root dies 
and is replaced by branches, the length ceases to be a measure 
of the growth. But wherever it was any fair test it is included in 
the tables, so that the unquestionable influence of the growth on 
the turgor may be apparent. The cotyledons of seedlings in 
the last two cultures (4 and 5) were emptied more slowly than 
those of the others, which would tend to keep down the turgor 
of the growing parts. Occasional tests of the leaves of 1 and 3 
showed their turgor to agree at about 3.5 per cent. 
Phaseolus vulgaris. Seedlings put in the solutions Decem- 
ber 9. 
1. Normal. 
Jan. 9 Jan, 18 Jan. 27 Feb. 27 
length 1g™ 7 
— } turgor 2.5% 2-2.5 % 3% 3% 
length g™ ce 
on turgor 2% 1.5-2% 2% 2% 
2. Distilled H,O. 
Stem } length 1o™ (tip dead) dead. 
turgo 
2.5-3% 2.5-3% 
gm gam 
Root } length dead. 
turgor 29 2% 
3. Na instead of K. 
a ay ae 
Stem } turgor 2% 2-2.5 & 2.5% 2.5-3% 
2 
} turgor 1.5% 1.5-2% 1.5% 2% 
nN eet Me fo) ee 
—— 
