BOTANIC MATERIA MEDICA, . 149 
mors of the body, and is one of our most valua- 
ble agents in arresting the flow of blood from 
any part or organ of the human frame, The 
oil of the seed is bland and useful in many ways, 
and will be spoken of under its own proper head. 
The preparations of the cotton root should not 
be dispensed indiscriminately, as they are dan- 
gerous. The fluid extract is officinal, and is 
given in doses of 3o to 60 drops ( to 4 grams). 
Juglans, Butter Nut, Juglans Cinerea.—Nat- 
ural order Juglandacexe. Native of the North 
American Continent, and commonly known as 
the oil nut tree, This handsome tree attains a 
height of from 40 to 50 feet, adorned with ses- 
sile leaves arranged in pairs, there bein g as many 
as seven leaflets, with an odd leaflet at the top. 
The leaflets are oblong lanceolate in shape, and 
pubescent upon their under surface; the fertile 
flowers are solitary or in spikes, whilst the ster- 
ile flowers are in catkins, the calyx a mere scale 
(adnate). Fruit, an oblong nut about the size 
of a small egg; pubescent and clammy to the 
touch, and very richin oil. The bark of the tree 
is the part used in medicine, and occurs in com- 
merce in curved or flat pieces from one-eighth 
to one-fourth of an inch (3 to 6 millimeters) _ 
thick; in color an orange-brown, rather lighter | 
on the inner surface, and finely striated. When 
broken the fracture presents a very delicate net- 
work of fibres; taste bitter and acrid; odor little 
ornone. It contains ¢annin, volatile oil, Vestn, 
nucine ot juglone ; the latter constituent has been 
obtained in form of orange-yellow crystals, which 
are said to be volatile, and give a purple color to 
alkaloidal solutions. There is said to be about 
