414 O N O P I U M. 



of the lettuce^ would prove far more valuable to the Materia 

 Medica, than the common opium : for by the comparative ex- 

 periments 3d and 4th, ten grains of extra£live matter 

 were taken up from oviq fcruple of the lettuce opium ; whilft 

 only nine grains of the common opium were taken up 

 from the fame quantity. Tliis in a pound weight, will give 

 a very decided advantage oijjx drachms, one fcruple, four 

 grains, to the lettuce opium, above the common ; for ia 

 one lb. of the lettuce opium, one half, or 8 oz. are extract- 

 ive matter, whilft of the common opium only 7 oz. i fc. 

 I dr. 16 grs. are extraft. 



Common Opium, 



gr«. grs. 



If 20 : 9 : : 7680. the No. ia ift. 

 9 



s|o I 6912I0 



610 I 345i6 



8 I 57- 36 



oz. 7. I. I. 1 5. 



As I conceive the foregoing fails may prove ferviceable 

 to my fellow citizens, I have taken the liberty of drawing 

 them up in the form of a paper, addreffed to your refpedt- 

 able Body, as the fureft mode of obtaining their promul- 

 gation. 



I have the honor to be, 



With the greateft refpedt, 



Your obedient humble fervant, 



John Redman Coxe. 



