2i6 Dr. Muhlenberg on Tall- Meadow-Oats, 6?c. 



fquare perches. Should thefe experiments prove fuccefsful, as 

 I do not doubt, what a noble acquifition would our flone-coals 

 be ! At prefent they are too dear, but when the Sufquehanna 

 is improved, I expert they will be exceeding cheap. I have 

 a very valuable treatife on thefe mineral manures, written 

 lately by a German chemill, Ruckers. 



THE Society is very happy in hearing that a part of the 

 valuable life and learned labours of Dr. MuhlenbePvG are 

 employed in making cut a " Hiftory of the Graffes ;" fmce 

 from the agricultural fldll and botanical knov/ledge of this 

 gentleman, fuch a work may be expcfted to be highly ufeful, 

 both to the man of fcience and the praftical farmer. 



The fmall work of William Curtis, containing practical 

 obfervations on the Britifli graffes, beil adapted to the laying 

 down, or improving of meadows and paftures, to which is 

 added, an enumeration of the Britifli graffes, has been received 

 by the Society ; and the following abflrad made from it, is 

 offered to fuch of their fellow-citizens as cannot procure the 

 original : Mr. Curtis begins by obferving, that much meadow 

 and pafture land may be rendered infinitely more valuable 

 than it is at prefent, by the introdudion of fome of their bed 

 graffes, and obferves, that neither the founded reafonings nor 

 befl diredled premiums have fucceeded in exciting the hufband- 

 man to collect and cultivate feeds of this fort, and laments 



