[ 427 ] 



Thus the Englifh faffron is now acknowledged greatly to 

 furpafs that of Spain and other countries j the affafoetidu 

 plant, though a native of Perfia, now flourilhcs in the bo- 

 tanic garden at Edinburgh ; and it is to be hoped, that in 

 time, the Englifh rhubarb, which already rivals the Eafl- 

 Indian, may, by due attention, be brought to equal that of 

 Ruflia or Turkey. 



Bath, Dec. ii, 1784. 



Obfervations and Experiments on the coviparative Vir^ 



iues of the Roots and Seeds of Rhubarb; wherein 



fome fingular Properties of their Refidua (after 



aqueous or fpirituous Tinciures had been ex t raffed 



from them) are difcwered. 



[By the Same.] 



Nil intentatum linquere. Mart. 



Gentlemen, 



I SUBMIT to your confideration the following addi- 

 tional experiments, as a Aipplement to my late paper on 

 rhubarb. 



Being defirous to know whether the four different kinds 

 of rhubarb, mentioned in my laft, retained any purgative 

 quality after the tin£tures were drawn from them by proof 

 fpirit, I made the following experiments : — 



Experiment I. Thirty grains of the refiduum of the Turkey 

 rhubarb were given in two oiincci of fpriiig waicr to tlic lame 



young 



