[ i«3 ] 



in an eminent degree, as I have already hinted in 

 my laft,* and feem worthy of further inquiry. The 

 felenitic fait, which I alfo there mentioned, has been 

 but very lately difcovered to be a condiment prin- 

 ciple in rhubarb, and other aftringent vegetables. 

 The ingenious Mr. Sheele pronounces it a com- 

 bination of the acid of wood-forrel with a calcari- 

 ous earth. Should this be found to obtain univer- 

 sally throughout that clafs of vegetables, it may 

 help to enlarge our views concerning the nature of 

 their aftringent principle. 



I am, Gentlemen, your very humble fervant, 

 A. FOTHERGILL. 



* See the Society's Third Volume, as above. 



mt m 



Article VII. 



On a more fpeedy Method of. propagating Rhubarb. 



By Mr, Hayes, Surgeon, at Hampftead. 



[Communicated by Dr. Fothergill.] 



gentlemen, Feb. 15^, 1787. 



NOtwithftanding much has been written on the 

 means of cultivating a very valuable root, 

 the Rheum Palmatumj permit me to add my 

 N 3 mite 



