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ss a Set 
An account of the Sugar Maple-tree of the Vaited States, and 
of the methods of obtainag Sugar from tt, together wilh 
obfervations upon the advantages both public and private 
of this Sugar. Ina letter ig Tuomas JEFFERSON, 
Eq. Secretary of the United States, and one of the V 1Cé 
Prefidents of the American P hilofophical Society by BEN- 
ymin Rusu, M.D. Profeffor of the Inflitutes and of 
Clinical Medicine in the Univerfity of P ennfy/vania. 
DEAR SIR, 
Read Aug. WB N obedience to your requeft, I have fet down 
hg io to communicate to our Society through the me- 
dium of a letter to you, a fhort account of the Sugar Ma- 
ple-tree of the United States, together with fuch fa&ts and 
remarks as I have been able to collet, upon the methods 
of obtaining Sugar from it, and uponthe advantages both 
public and private, of this Sugar. 
The Acer Sacharinum of Linnzus or the Sugar Maple- 
tree grows in great quantities in the weftern countries of 
allthe middle ftates of the American Union, Thofe which 
prow in New-York, and Pennfylvania yicld the Sugar ig 
a greater quantity than thofe which grow on the waters 
of the Ohio.—Thefe trees are generally found mixed with 
the Beach, (a) Hemlock, (b) white and water ath, (c) the 
Cucumber tree, (d) Linden, (e) Afpen(f) Butter nut, (g) 
and wild cherry trees.(h) ‘They fometimes appear in 
groves covering five or fix acres in a body, but they are 
more commonly interfperfed with fome or all of the foreft 
trees which have been mentioned. From 30 to so treesare 
generally 
(a) Fagus Ferruginea. (b) Pinus abies. (c) Fraxinus Americana. (d) Magnolia acu- 
minata. (e) Vilia Americana. (f) Populus tremula, (g) Juglans alba (oblonga.) (hy 
Pruaus Virginiana, of Linnzus. 
