HEMLOCK. 123 
the juice or the decoction should be evaporated at 
the heat of boiling salt water. The stock should be 
renewed eyery year. A suitable dose for commence- 
ment is from one to five grains. This may be in- 
creased at every time of taking it, until its constitu- 
tional effects are felt. In beginning the use of a 
new parcel, more caution is requisite at first, than 
after its strength has been tested. 
The Aithusa cynapium, an umbellate plant 
very common in Boston, has sometimes been mis- 
taken for Hemlock, which it considerably resem- 
bles. Itis a smaller plant, with its stalk not spot- 
ted. It differs also in haying no general mvolucre. 
while its partial one is very long. 
BOTANICAL REFERENCES. 
Conium Maculatum, Linnaxus. Sp. Pl.—Woopvitte, t, 22.— 
Curtis, Fl. Lond. i. 17.—Smrrn, Engl. Bot. t. 1191.—Pursu, i. 
195.—Cicuta vulgaris, Morison, Umb, t.6.—Parxinson, Theatr, 
933.—Cicuta major, Lamarck, Encyclopedie Methodique.—Ci- 
cutaria vulgaris, Crusius, Hist. 200. 
MEDICAL REFERENCES. 
Murray, Apparatus medicaminum, i. 322,—CuLLEN, Mat. Med. 
ii, 263.—Foruercii1, Med. Obs. iii. 400.—Hun Ter on the ve- 
nereal, 108, 175, 199, 247, &c.—Home, Annals Med. iii. 66.—But- 
TER, Med. Comment. i. 373.—F1suER, Mem. Mas. Soc. i.—Jack-. 
son, WV. Engl. Journ. ii. 105.—GuErsent. Dict. Sciences Medi- 
eales, vy. 208.—OrrFiia, Toxicologie, iii. 279, &e. &e. &e. 
