118 ~ COP—COR 
distilling Copaiba—more than a moiety of a very acrid of 
_ fensive volatile oil is expelled, leaving a brown resinous 
—_extraet, becoming hard and brittle when cold. In this, 
_ according to Mr. Thorn, all the virtues of the balsam re- 
side. He gave grs. x, in pills, three times a day. Dose 
___ of the balsam, Jss to 3j, three times a day. 
Often adulterated, and meen entirely factitious. Ac- 
cording to Bucholz, is adulterated if a mixture of 4 parts. 
of pure alcohol, and one of rectified ether, does not dis- 
_ solve it. 
No, 190,—Corris Trrroia. Gold-thread—mouth- 
weed. The root. 
Synonym—Helleborus trifolius. 
Indigenous—very bitter—used in aphthz. Dose, of the 
tincture, f3j—of the decoction, f j. See W. P. C. Bar- 
ton’s Veg. Mat. Med. U. S. Vol. IL. fora detailed account. 
ayo? tae Jeff. Coll. No. 219—figure of the plant, 
0. 220, : 
& 
No. 191.—Corrarra MyrtiFoLta, A deadly, nar- 
cotic, poisonous plant. 
No. 192.—Cornua of the Colleges. Cervus Elapus. 
Cabinet specimen, Jeff. Coll. No. 221. 
Stags’ or harts’ horns were formerly used for the preparation 
_of Ammonia—hence that alkali was called spirit of harts- _ 
horn, 
/ e 
No. 193.—Cornus. Dogwood. 
Indigenous. Three species medicinal—introduced into the 
Phar. U.S. 
1. Cornus florida. Dogwood tree—New-England boxwood. _ 
cee cimen, Jeff. Coll. No. 222—figure of the tree, 
2. Cornus Sericea. Swamp dogwood—Red willow. 
; Cabinet specimen, Jeff. Coll. No. 224—figure of the tree; 
No. 225. 
3. Cornus circinata. Mountain willow—Round-leaved dog- 
wood. . ame 
Fora detailed account of Nos. 1 and 2, see W. P.C. Bar- 
ton’s Veg. 3 
Mat. Med. U.S. Vol. L For No. 3, Ives’ e 
, Hp MR 2 ese, 
4 
Z 
