1914] BRIEFER ARTICLES 73 
PLANTS GROWN UNDER SHADE 
No.of lant | “pubaane mo | gynetsmace,, | ganas, | stants 
PO etn a, 211.43 42,122 21.36 1972 
A ae ee : 199.08 38,256 21.88 1748 
Tee ee ey, 184.67 36,448 20.15 1809 
Mee ee es 172.56 33,065 19.91 1706 
es ss ak 186.80 33,922 21.56 1573 
ee ee 194.27 32,407 21.61 1500 
Ayerage..:...... 188.14 36,187 21.08 1718 
From this table it appears that the total dry substance produced by 
the plants was about equal in the two sets. 
The plants grown in the open absorbed about 28 per cent more water 
than those grown under shade. The plants which absorbed and tran- 
spired the greater quantity of water contained both the smaller percentage 
and the smaller absolute quantity of ash. 
It appears, therefore, that the absorption of salts by roots is inde- 
pendent of the absorption of water, and that the transpiration stream 
does not exert an accelerating effect on the entrance of salts—HEINRICH 
HASSELBRING, Bureau of Plant Industry, Washington, D.C. 
