198 HORTUS GIIAMINEUS WOBURNENSIS. 



Native of Britain. Root perennial. 



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



clayey loam is — 



Produce per Acre, 

 dr. qr. lbs. 



Grass, 22 oz. The produce per acre is 

 80 dr. of grass weigh, when dry - 40 > 



The produce of the space, ditto - 176 5 

 The weight lost by the produce of one acre in drying 

 64 dr. of grass afford of nutritive matter 2 dr. 6 gr. ^ 

 The produce of the space, ditto - 363 3 



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

 Grass, 40 oz. The produce per acre - 27225 



dr. qr. 



80 dr. of grass weigh when dry - 34 ^ 11^70 in 



The produce of the space, ditto - 272 S 



The weight lost by the produce of one acre in drying 15654 6 



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



The produce of the space, ditto - 27 2 5 



The produce of latter-math is — 



Grass, 14 oz. The produce per acre - - 9528 12 



64 dr. of grass afford of nutritive matter 1 2 223 5 4 



A comparison will shew how inferior this smaller variety of 

 meadow cat's-tail grass is to the larger variety. 



The larger meadow cat's-tail-grass, as before, affords of nutri- 

 tive matter from the produce of one acre : 



lbs. lbs. 



At the time of flowering - - 1595 7 



At the time the seed is ripe - 3668 S 



The smaller variety of meadow cat's-tail-grass affords, 

 from the produce of one acre at the time of flower- 

 ing and ripening the seed, as above - - 1684 

 The weight of nutritive matter, in which the produce 

 of the larger variety of meadow cat's-tail-grass ex- 

 ceeds that of the smaller is - - - 3579 



Or, the former grass is superior to this one, in the proportion 

 nearly of 25 to 8. This shews how important a point it is to dis- 

 tinguish one variety of grass from another, when they are so very 

 much alike in outward characters, as in the above instance. The 

 seeds are also very similar to each other, or rather the marks which 

 distinguish them from each other are minute. A careful examin- 



