Foreign Vegetables. 269 
Mafs remaining in the Retort weighed feven Ounces 
and fix Drachms *, which being calcined thirty 
Hours in a crucible by a reverberatory Fire, left one 
Ounce and thirty fix Grains of gray Afhes *, from 
which were got three Drachms and thirty fix Grains 
of fixt alkaline Salt. 
Gum Arabick is void both of Tafte and Smell. 
It diffolves in Water, and not in Spirit of Wine or 
Oils. In the Fire it does not take Flame, but is 
converted into a Coal. Whence it appears, that it 
is compounded of a neutral Salt combined with a 
thick Oil, and a large Portion of Earth. 
By its mucilaginous Parts it foftens and infpiflates 
(harp thin Lymph, and calms the too violent Mo- 
tion of the Humours. It is given to Advantage in 
Diforders of the Jaws, in Hoarfenefs, Coughs, fa- 
line Catarrhs, Spitting of Blood, Stranguries, and 
bloody Urine. The Dofe is from 9j. to gij. It is 
likewife ferviceable where the Mucus , which covers 
the internal Parts, hath been abraded, as in the 
Jaws, Stomach, Inteftines, Bladder, and Urethra ; 
for it befmears the Paffages over with its mucilagi- 
nous Parts, and preferves them from the corrofive 
Acrimony of the Humours. Moreover it is ufe- 
fully mixed with acrid irritating Medicines, to ob- 
tund and temper their Force. Externally, being 
applied to Wounds, it flops Bleeding. We mull 
obferve, that to reduce it conveniently into Pow- 
der, the Mortar in which it is pounded ought to 
be hot. 
It is given either in Powder, or difTolved in pro- 
per Liquors. 
Take of Gum Arabick py. Liquorice- Juice ^fs. 
Sugar-Candy §fs. the diftilled Water of Orange- 
Flowers, q. f. Make them into Troches, 
which may be ufed in Roughnefs of the Jaws, 
Hoarfenefs, and Coughs. 
Take 
