( 161 ) 
In order that this work foould contain the whole of the 
vegetable Matzria Mepica, included in the Lonpon 
and Epinsurcu Puarmacopogtas, it has been thought 
necefjary to add the following 
APPENDIX. 
AmmMoNIAcUM (gummi refina) Pharm. Lond. &F Edinb. 
pe concrete gummy-refinous juice is compofed of little lumps, 
Hor tears, of a milky whitenefs: the external parts of the mafs 
are yellowith or brownith, and the white tears change to the fame 
colour on being expofed for fome time to the air. 3 
We have hitherto had no information concerning the plant which - 
produces this drug, nor of the manner in which it is obtained : 
judging however from the feeds and pieces of an umbelliferous 
plant, with which it is often intermixed, there is no doubt of its 
. being the produce of a vegetable of this kind; and as Ammoniacum 
is very analogous to galbanum, the former, as well as the latter, is 
probably procured from a fpecies of the Bubon. According to the 
antient account of this drug, it was produced in the weft of Egypt, 
where the famous temple of Jupiter Ammon formerly ftood, now 
the kingdom of Barca, At prefent'it is brought here from Turkey, 
and from the Eaft Indies. | 
Ammoniacum has a ftrong and fomewhat ungrateful fmell, and a 
naufeous fweetith tafte, followed by bitternefs. Its effets are fimilar 
to thofe of galbanum, or rather of aflafoetida, but it has been generally 
preferred to either of thefe for refolving obftrutions of the lungs ; 
hence it is chiefly employed in afthmas and difficulty of expectora~ 
tion. In large dofes it opens the bowels. 
No. 13+ 2s ANGUSTURA 
