I9rs] SCHREINER & SKINNER—GLYCOCOLL 449 
the solutions when about 2 cm. tall, and grew for 12 days. The 
removal of salts was studied by analyzing the solutions for phos- 
phate, nitrate, and potash, and the growth was observed and 
compared with its control, and the weight of green plants taken 
at the end of the experiment. The plants grew in these solutions 
from February 7 to February 19, 1914. __ 
As the plants grew in the solutions, it was apparent that the 
glycocoll affected growth differently in the solutions containing 
different nutrient salts. The growth was increased much more 
by glycocoll in the solutions which contained no sodium nitrate 
than in those which contained large amounts of nitrate, as com- 
pared with the respective controls. This will be apparent from the 
weights of the green plants given in the accompanying tables. 
TABEE I 
EFFECT OF GLYCOCOLL IN CULTURE SOLUTIONS CONTAINING VARYING 
‘TS OF PHOSPHATES AND POTASH AND NO NITRATE 
GREEN WEIGHT 
& N OF SOLUTIONS 
~ 
9 
z 
oS = 
nm 
fo) 
Without With 50 ig 
glycocoll glycocoll 
ppm. ppm | ppm. gm. gm. 
80 fe) 1.01 1.05 
72 ° 8 1.26 758 
64 fe) 16 1.83 1.85 
50 fo) | 24 I.50 1.05 
48 fe) 32 1-85 2.05 
40 ° 40 1.47 2.00 
32 ° 48 1.30 2.05 
24 fo) 56 50 1.95 
16 | ° 64 1.65 1.70 
8 ae) 2 1.40 1.90 
° | ° 80 1.37 1.65 
Table I gives the green weight of the plants in solutions without 
and with glycocoll. The first three columns give the composition 
of each solution in parts per million P,O, as calcium acid phosphate, 
NH, as sodium nitrate, and K,O as potassium sulphate. The 
fourth column gives the green weight of the plants grown in solu- 
tions without glycocoll, and the last column the weight of the © 
plants grown in solutions with 50 ppm. glycocoll. 
An examination of the table shows that glycocoll, in those 
solutions which contained no nitrate, but varying amounts of 
