1915] SCHREINER & SKINNER—GLYCOCOLL 457 
s 
presented in an earlier paper’ and needs no further exposition here. 
As shown in this earlier paper, the maximum growth takes place in 
the middle region of the lower part of the diagram; that is, in those 
cultures which contain phosphate between the limits 8-24 ppm., 
and nitrate and potash between the limits 24-48 ppm. These 
are the cultures represented by group a in fig. 3, which is here 
Fic. 3.—The arrangement of the culture solutions in groups: 4, b, c, three fertilizer 
element | groups; d, two fertilizer element group; e, one fertilizer element group. 
again reproduced to make the discussion clear. It has been shown 
that this group a has the largest growth, and the greatest absorp- 
tion of nutrients by the growing plants also takes place in this 
group. Both growth and absorption become less successively in 
groups 6, c, and d. The latter group contains only two of the 
fertilizer elements in any one solution, and the growth in these is 
INER, O., and SKINNER, J. J., Ratio of phosphate, nitrate, and potassium 
on absorption and growth. Bor. Gaz. 50:1. 1910. 
