80-3 
contains less oxygen than that obtainable from £. heferophyllum, and consists 
mainly of a terpene (C,,H,,), which, after distillation over sodium, boils at 176° 
(348.8° F.), and has a sp. gr. of .8464 at 18° (64.4° F.).* 
PHYSIOLOGICAL ACTION,—The symptoms arising during the experiments 
of Dr. W. H. Burt, were mainly as follows: Cephallagia ; smarting of the eyes; 
roughness of the pharynx; soreness of the throat; abdominal distress, and colic; 
increased urine; aching of back and extremities; and prostration. 
DESCRIPTION OF PLATE 80. 
1. Inflorescence, Binghamton, N. Y., Aug. 18th, 1886. 
2. A portion of the mid-stem. 
. Lower leaf, 
. Flower-head. 
. Ray-floret. 
. Disk-floret. 
. Scale of the involucre, 
. Stamen. 
Fruit. 
(4-9 enlarged.) 
SO St Am & & 
————$—$—$—$—$ rrr 
= Se * Am. Your. Phar., 1883, 372 ( Berichte, 1882, 2854). 
+ Am, Hom. Obs., 1866, p. 357: 
