450 BOTANICAL GAZETTE [JUNE 
phosphate and potash, produced an increased growth in every 
culture. The total weight of the 11 normal cultures was 15.63 
grams, and the weight of the glycocoll cultures was 19.70 grams, 
an increase of 26 per cent. 
In table II are given the cultures which were composed of 
8 ppm. of NH, as nitrate, and varying amounts of phosphate and 
potash. 
TABLE Il 
EFFECT OF GLYCOCOLL IN NUTRIENT SOLUTIONS CONTAINING VARYING 
MOUNTS OF PHOSPHATE AND POTASH AND 8 PPM 
OF NH; AS NITRATE 
COMPOSITION OF CULTURE SOLUTIONS GREEN WEIGHT 
i m. 
- a 8 foccel A wee 
ppm ppm. ppm. gm. gm. 
72 8 fe) 1.48 1.65 
64 8 8 1.73 2.05 
56 8 16 2.20 2.09 
48 8 24 2.40 2.43 
40 8 a2 2.37 2.70 
+2 8 40 2.34 2.35 
24 8 48 £430 1.45 
16 8 56 2.20 2.25 
8 8 64 2535 2.40 
fe) 8 72 1.90 2.05 
| 
The growth in this series of solutions was slightly better where 
glycocoll was added. An examination of the green weight columns 
of the table will show that nearly all the glycocoll cultures were 
slightly heavier. The total weight of the 10 cultures without 
glycocoll was 20.27 grams, against 21.42 grams for the cultures 
with glycocoll. This is an increase of 6 per cent. 
The effect of glycocoll on growth in nutrient solutions containing 
still larger amounts of sodium nitrate is given in table III. These 
solutions, like the ones in the previous tables, are composed of 
varying amounts of phosphate and potash, but each contains 
~ 16 ppm. of NH, as nitrate. 
In some of these solutions the glycocoll has slightly increased 
the growth, and in others the growth is slightly below the normal 
culture. The total weight of the 9 cultures without glycocoll was, 
