134 
SOME COLORADO GRASSES. 
be very small, either of which would make it worthless 
from an economic standpoint. It must be, then, that all 
these factors must be taken into consideration in deter¬ 
mining the feeding value of any sample. We have deter¬ 
mined but one factor in the chemical analysis, the other 
factors will be determined in this and the following years 
by the grass station. 
It is eminently proper that some tribute should be 
made to the last work of the lamented Prof. Cassidy. The 
memory of many other treasured things in this life will 
grow old, fade away and be lost, long, long, ere I shall 
forget his kindness. His benign influence, his Christian 
virtues, his gentlemanly deportment and his scholarly 
attainments, will always find a green spot in my memory. 
DAVID O’BRINE, 
C hemist. 
