7 athe A . OT La et hee eee | eee eat! Peg Ce ee 
ve ~ ; Wie oy casa wee. Nerney ate ea 
= x ; aac ‘Leta Eh n> 
‘ead aS 
-The specimens, it will be seen, are from all parts of the country and— 
grown under every condition of soil and environment. Those collected. 
by Dr. Peter Collier in 1878 and 1879 were mostly from the poorer 
soils, and were intended to represent the wild grasses of the country. — 
Those collected in subsequent years by myself were chiefly cultivated | 
varieties. The development in nearly every case was full bloom or 4 
shortly after, that being the period at which the grasses as a whole. 
seem to be cut for hay. 
The analyses have been calculated for “‘ dry substance,” and also for — 
‘‘fresh grass,” where the amount of water in the fresh grass had been 
determined ; otherwise, for the average amount of water in hay as given 
by Wolff. This figure is probably too high for the United States, owing 
to our drier climate; but, in the absence of exact data for the selection — 
of a more accurate one, it has been provisionally accepted. It is very — 
easy to calculate from the composition of the dry substance what effect 
the presence of any percentage of water would have on the absolute 
amount of any constituent present in a given weight of grass. 
