Juglans cinerea, 
Triosteum perfoliatum, Anthelmintics. 
Cassia marilandica, _ Spigelia marilandica. 
Diaphoretics. _ External stimulants. 
Aristolochia serpentaria, — Juniperus Virginiana, 
Asarum Canadense, Rhus Vernix, 
Xanthoxylum fraxineum, Rhus radicans. 
ee 
PREFACE, Vil 
. Emetics. Solidago odora, — 
Lobelia inflata, Ba Gaultheria procumbens, 
Phytolacca decandra, Laurus sassafras, 
Gillenia trifoliata, ~ Illicium Floridanum. 
Veratrum viride, 
Sanguinaria Canadensis, Diuretics. 
Tris. versicolor, Juniperus communis, 
Apocynum androseemifolium, — Pyrola Umbellata. 
Dirca palustris, 
Euphorbia ipecacuanha, Expectorants. 
Euphorbia corollata. Polygala senega, 
_ Erythronium Americanum. praca tuberosa. | 
_Cathartics. : PS Be 
Podophyllum peltatum, Panax quingefolium. 
” 
We avail ourselves of classification in the 
Materia Medica founded on the kind of operation 
which medicines exert on the human body, be- 
cause there are seemingly no better characteris- 
tics by which to arrange them. But even this 
method is defective, because few medicines are 
simple in their operation, and ‘of course most 
of them have claims to stand in more than one 
class. As examples, Tobaceo, Henbane, Fox- 
