HORTUS GRAMINEUS WOBURNENSIS. 191 



Experiments. At the time of flowering, the produce from a 

 rich sandy loam is 



Produce per Acre, 

 dr. qr. Ibs. 



Grass, 32 oz. The produce per acre - 21780 



80 dr. of grass weigh, when dry 30 1 



The produce of the space, ditto - 192 3 



The weight lost by the produce of one acre in drying 13612 8 



64 dr. of grass afford of nutritive matter 437 



v i f)\ o 7 7 



The produce of the space, ditto 38 3 



At the time the seed is ripe, the produce is 

 Grass, 32 oz. The produce per acre - 21780 



80 dr. of grass weigh, when dry 32 7 



The produce of the space, ditto - 205 0* 3 

 The weight lost by the produce of one acre in drying 13068 

 64 dr. of grass afford of nutritive matter 4 37 

 The produce of the space, ditto 38 3 



The produce of latter-math is 

 Grass, 14 oz. The produce per acre 9528 12 



64 dr. of grass afford of nutritive matter 3 2 7 



> ^91 



The produce of the space, ditto 38 3 



The crops of this grass, at the time of flowering, and at the 

 time the seed is ripe, are equal in point of quantity and nutrient 

 quality, a circumstance which has not occurred in any other grass 

 mentioned in this series of experiments. The nutritive matter 

 contained in the latter-math is likewise greater than in most 

 other grasses. The root-leaves are produced on a shoot, and 

 stand in two rows after the manner of a fan. This shoot, which 

 is formed by the union of the base of the leaves, is very succulent, 

 and contains a greater proportion of nutritive matter than the 

 leaves, which accounts for the superiority of the latter-math in 

 nutritive matter. This grass is remarkably hardy. In February 

 17, 1814, after the severe winter preceding, this species of Poa 

 was perfectly green and succulent, while not one species of grass, 

 out of nearly 300 different species that grew around it, remained 

 in a healthy state, but were all inferior, and more or less injured 

 by the severity of the weather. In the following season, the 

 produce rather exceeded the above, though it had been mown 

 the preceding season, and no manure had been applied. It is 

 a native of North America, where the winters are longer or more 



