1915] SCHREINER & SKINNER—GLYCOCOLL 459 
We will next consider the solutions of group 6, which contained 
more unequal ratios and which have previously proved to have 
a poorer physiological influence on plants as manifested by the 
growth. The composition of these solutions together with the 
green weights of the two sets of cultures is given in table VI. 
TABLE VI 
GROWTH OF WHEAT PLANTS IN CULTURE SOLUTIONS OF GROUP ) WITHOUT AND WITH 
METHYL GLYCOCOLL 
COMPOSITION OF CULTURE SOLUTIONS | GREEN WEIGHT 
No. : . 
P.Os NH; | K.0 sadlel ceaesil salir accel 
ppm. ppm. ppm. gm. gm. 
re 48 16 16 2.25 1.70 
ae 40 16 24 2.19 | Vet A" 
2 a oe a 40 24 16 2.14 I.40 
ae ke 32 16 32 be 1.95 
Bee 32 32 16 2,02 72 
Ee oa ate | 24 16 | 40 2.44 1.84 
EUS eect 24 40 16 2.32 i.70 
Ge rs | 16 16 | 48 2.55 1.70 
2 Sn aaa 16 48 16 2-37 1.55 
wee | 8 16 56 ce ee Marae | 
Bees eer. 8 56 | 16 2.22 1.70 
The figures show that methyl glycocoll produced less growth 
than the normal solutions. The green weight of the 11 normal 
cultures was 26.10 grams, against 18.70 grams total green weight 
for the methyl ‘glycocoll cultures, a reduction of 29 per cent due to 
the methyl glycocoll. The 11 normal cultures absorbed 27.43 mg. 
of P,O,, NH,, and K.O, while the methyl glycocoll cultures absorbed 
19.45 mg., a reduction of 22 per cent in nutrients absorbed. It is 
interesting to note that methyl glycocoll reduced both the growth 
and absorption less in these cultures of group } than in those of 
group a given in table V. 
In table VII is given the effect of methyl glycocoll in the solu- 
tions of group c, which have been shown to be not as suitable for 
plant development as those given in the two preceding tables. 
The total green weight of the 15 cultures without methyl 
glycocoll was 29.50 grams, and the total green weight of the same 
solutions containing methyl glycocoll was 22.95 grams, a reduction 
