1915] SCHREINER & SKINNER—GLYCOCOLL 463 
glycocoll and methyl glycocoll is shown in fig. 4. The effect of the 
compounds was not materially different in the solutions of different 
composition. No. 1 is the control culture, no. 2 in addition to the 
nutrient salts contains 50 ppm. of glycocoll, and no. 3 contains 
50 ppm. of methyl glycocoll with calcium carbonate. It will be 
observed that the plants in the glycocoll cultures are slightly larger 
than culture no. 1, the control. The characteristic effect of methyl 
glycocoll is shown in the third culture. The photograph shows 
the growth to be smaller and the stems twisted and leaves growing 
almost horizontally. The growth in the 11 cultures containing 
methyl] glycocoll was 27 per cent less than in the control set, which 
shows that lime has not changed its physiological action. 
Som Fertitiry INVESTIGATIONS 
DEPARTMENT OF AGRICULTURE 
WASHINGTON, D.C. 
