THE AGRICULTURAL GRASSES OF THE UNITED STATES. 131 



amount of digestible carbo-hydrates. In the grasses of both countries 

 the fiber increases with, regularity as tbe nitrogenous constitutents 

 decrease, and of the latter the non-albuminoid portion is relatively 

 greatly the poorer the quality of the grass. 



CHANGES IN COMPOSITION DURING GROWTH. 



In addition to the single analysis previously tabulated, analyses 

 have been made of series illustrating the changes in composition of 

 several species from the appearance of the blade to the maturity of the 

 seed. 



The grasses examined comprise: 



1. Jgrostis vulgaris. (Red top.) 

 A series from richer soil. 

 A series from poorer soil. 

 11. Plileum praiense. (Timothy.) 

 A series from richer soil. 



t 



A series from poorer soil. 



A series of first year's growth from seed sown in garden soil. 

 A series from La Fayette, Ind. 



A series from Hanover, N. H., the two latter from rather poor soil. 



III. Dactylis, glomerata. (Orchard grass.) 



A series from the first growth. 

 A series from later growth. 



IV. Alopecunts 2>ratensis. (Meadow fox-tail.) 



A series from good sod. 

 Y. Poa pralensis. (Blue grass, Meadow grass. ) 



A series from good soil. 



A series from poorer soil. 



A series from the wayside. 



A series from Quincy, 111. 

 YI. Poa compressa. (Wire grass.) 



A series from poor soil. 

 TIL Bromus unioJoides. (Schra-der's grass.) 



A series from rich garden soil. 

 Tin. Bromus erectits. (Broom grass.) 



A series from poor soil. 



IX. Holcus lavatus. (Satin grass.) 



A series from poor soil. 



X. Arrhenatherum avenaceum . 



A series from medium soil. 



XI. Stfaria glauca. 



A series from medium soil. 



XII. Anthoxanthvm odorafum. (Sweet vernal grass.) 



A series from medium soil. 



XIII. FesUica ovina. (Sheep's fescue.) 



A series from poor soil, growing in bunches. 

 XIT. Lolium IlaJicum. (Italian Rye grass.) 

 A series from low moist soil. 



A series of first year's growth from the seed in garden soil. - 

 XT. LoU 11711 perenne. (Rye grass darnel.) 

 A series from medium soil. 



