150 HORTUS GRAMINELIS WOBU KN ENSIS. 



panicle branches both ways, it droops much at first, and the 

 flowers grow much more loosely ; the spikets are more round, 

 ovate, and pointed : whereas in the pratensis they are some- 

 what linear, flat, and obtuse. Curt. Lend. E. Bot. 1592. 

 Wither. Arr. 

 Experime7its. — On the 16th of April, the produce from a fertile 

 peat soil, with coal ashes as manure, is — 



dr. qr. 



Grass, 16 oz. The produce per acre 



64 dr. of grass aflbrd of nutritive matter 2 1"^ 



The produce of the space, ditto - 9 3 



At the time of flowering the produce is — 

 Grass, 20 oz. The produce per acre 

 The produce of the space, ditto, when dry 152 

 80 dr. of grass weigh, when dry - 38 



The weight lost by the produce of one acre in drying 7146 

 64 dr. of grass afford of nutritive matter 4 2 > 

 The produce of the space, ditto - 22 2 3 

 At the time the seed is ripe, the produce is — 

 Grass, 28 oz. The produce per acre 

 80 dr. of grass weigh, when dry - 32 ^ 

 The produce of the space, ditto - 179 04^5 



The weightiest by the produce of one acre in drying 11434 

 64 dr. of grass aff'ord of nutritive matter 1 2 | 

 The produce of the space, ditto - 10 2 3 



The weight of nutritive matter which is afforded by 



the produce of latter-math per acre, is - 380 



The weight of nutritive matter which is lost by leav- 

 ing the crop till the seed is ripe, exceeding one- 

 half of its value, is _ _ _ 510 7 8 



The grass at the time of flowering is of gre?tpr value than at 

 the time the seed is ripe, proportionally, as 3 to 1. 



The weight of nutritive matter which is lost by leaving the crop 

 of this grass till the seed be ripe, is therefore very great. That it 

 should lose more of its weight at this stage of growth than at the 

 time of flowering, perfectly agrees with the deficiency of nutritive 

 matter in the seed crop, in proportion to the nutritive matter 

 afforded by the flowering crop; the straws being succulent in the 

 grass of the latter crop, while those of the former are dry, and 



