256 ORD. XIII. Campanacee. VIOLA TRICOLOR. 
plant a sufficient time, this smell goes off, the scabs disappear, and 
the skin recovers its natural purity. 
Instances of the successful exhibition of this medicine, as cited by 
these authors, are very numerous; indeed this remedy, under their 
management, seems rarely, if ever, to have failed. It appears, 
however, that Mursinna,’ Ackermann,* and Henning,® were less 
fortunate in the employment of this plant; the last of whom 
declares, that in the different cutaneous disorders in which he used 
it, no benefit was derived. 
Haase, who administered this species of violet in various forms, 
and large doses, extended its use to many chronic disorders; and 
from the great number of cases in which it proved successful, we are 
desirous of recommending it to a further trial in this country. 
It is remarkable that Bergius speaks of this plant as a useful muci- 
laginous purgative, and takes no notice of its efficacy in the crusta 
lactea, or in any other disease. 
§ Med. chirurg. Beobacht.2. Samml. p. 107. &c. 
& See Comment. de rebus, &¢. vol. 27. p. 170. 
® See Beod, iber einige Arzneymittel. p. 65. 
ns EE, GARR 
The remaining medicinal plants, belonging to this order, are the 
species of the convolvulus, officinally called Mechoacanna, convol- 
vulus major, Turpethum and Soldanella; Dentaria or Plumbago 
curopza: Viola canina, or dog’s violet, the roots of which have 
lately been discovered to be both emetic and cathartic. 
