8 
ESSAY ON SCAMMONY. 
Guihourt: 
Resin, 
Alcoholic ext. 
Gum ext. 
Insoluble vegetable matter, 
Earths, 
75. 
6.25 
3.12 
7.25 
8.38 
100 
Marquat's analysis is more minute and elaborate; it may 
be consulted in Pereria's Materia Medica. It maybe stated 
that one specimen gave him 81.25 of resin, another 78.5, 
corresponding, the first, nearly to Christison, the second to 
Guibourt. 
Virgin Scammony, Two specimens have come under 
my observation. 
The first corresponds to the description given of vir- 
gin scammony. Its sp. grav.is 1.3. From it were obtained: 
Resin, .... 70.00 
Aqueous extract, . . 3.75 
Earthy matter, . . 5.00 
Veg. mat. destructible . . 20.00 
Loss, . . . 1.25 
The residuum from alcohol was of a greenish-brown 
colour, the residuum from water had nearly the same ap- 
pearance ; both were pulverulent. The resin was of a 
dirty greenish-brown colour. It affords slight efferves- 
cence with muriatic acid, and does not change with iodine. 
This specimen was imported from London. 
The second is more covered with ash-coloured powder, 
and in mass has a duller aspect. Sp. gr. 1.3. From it were 
obtahied : 
100.00 
