190 A COMPENDIUM OF 
vata. The first-mentioned species are used as 
adulterants of the Alexandria Senna, and they 
are considered much inferior in many respects 
to the Senna under consideration. Constituents 
are chrysophan, pheoretin, sennacrol, sennapt- 
crin, sennit, muctlage, and cathartic acid, The 
properties of Senna are laxative and purgative, 
and it has been used as such for many hundred 
years. The dose of the powder is from 30 to 
120 grains (2 to 8 grams). It is rarely given in 
this form, but in combination with the Com- 
pound Licorice powder. Dose of the infusion, 
1 fluid ounce; of the fluid extract, 30 to 60 drops 
(2 to4 grams). The officinal preparations are 
the Conrection, Fxiurp Extract, Inrusion, 
Comrounp Inruston, Putvis GLYCERRHIZ Com- 
POUND, Syrup SaRsAPARILLA Compounp and the 
simple Syrup or Senn~, 
Tobacum, Tobacco Nicotiana, Tabacum,— 
Natural order Solanacee. This annual plant is 
a native of the tropical Americas, and cultivated 
in many of the middle states of North America. 
The plant attains the height of 3 to 6 feet, with 
an erect hairy stem, adorned by numerous alter- 
nate leaves, which are entire, ovate and lance- 
olate in shape; they are of a pale-green color, 
pubescent and slightly viscid. The lower leaves 
are frequently six inches broad and several feet 
long. The virgin leaf was, and is, occasionally 
used asaremedy. The manufactured leaf con- 
tains all sorts of adulterants or compounds— 
pee cascartlla, tonca, vanilla, liquorice, mo- 
SSeS, Copperas, and even opiwm—and it is this, 
be its array of injurious compounds, which 
orms the solace and comfort of the idle hours 
