and Gum Arabic. — 64 1 
adulterated. Care, however, muft be taken that the Moors 
do not mix with it too much fand. It is probable that a 
tree of the fame kind produces the gum fandarac of Senegal, 
w ae is exported in pretty cohtideraie quantities. 
' Another article of commerce in which the kingdom of 
Morccco participates with Senegal, i is that gum called Gum 
Arabic, known by the name of 4/ lei/k. The tree which 
produces it grows only in the feuthern provinces of that 
ftate. The quantity of this article exported.to the different 
parts of Europe from the ports of Morocco may amount to 
about eight or nine quintals. M. Schoufboe fays, that this 
tree is the Mimosa nilotica, named in the country A/ thlah; 
but this is no reafon w hy the fame kind of gum fhould not 
be collected in the more fouthern countries of Africa from 
the Mimofa Senegal, and even from other trees of the fame 
fpecies, as we are told by various authors. In Barbary the 
people make a difference between the gum of Senegal and 
that of the country. The former is preferred on account of 
its purity, whitenefs, and tranfparency, which in general are 
the properties fought for in this article. 
_ The gum which I colleéted myfelf in the proyince of 
Mogador, fays M. Schoufboe, exudes frona the trunk and 
branches of the tree, in the fame manner as that of our 
fruit-trees. It is in round lumps, of the fize of a hazle-nut, 
or rather that of a walnut. Thefe lumps; indeed, by die: 
coming united to each other, form mafles fometimes of the 
fize of the fift, or even of the head; but this only happens 
in confequence of the adhefion which takes place between — 
the pieces of gum, when ftill frefh, after they have been de- 
tached from the tree, and chiefly at that part which was at- 
tached to the bark, where the refinous juice has not had time 
to harden. If earth, fmall ftones, and other foreign bodies, 
are fometimes found in thefe maffes, it arifes from fraud ; 
and M. Schoufboe fufpeéts that this circumftance has given 
rife to the opinion of the gum being found at the bottom of 
the tree, and that it exudes from the roots, which, as he 
thinks, is void of foundation. Were this the cafe, it appears 
to him that, befides the earth and fand with which the gum 
is accidentally dirtied, balls of thefe matters ought to be found), 
~YVot. V. li in 
