ESSAY ON SCAMMONY. 
9 
Resin, 
65.00 
Aq. ext. 
4.00 
Earthy matter, 
4.25 
Veg. matter, destructible. 
23.50 
Loss, 
3.25 
100.00 
It slightly effervesces with muriatic acid, and changes 
decidedly to blue with iodine. The alcoholic residuum had 
a brown ash colour; was disposed to cake when dried in 
the capsule. When exhausted by water, it presented a 
lighter colour and was pulverulent. 
The resin was transparent, and of a brown colour. The 
dried aqueous extract vt^as of a deep, clear brown colour, in 
powder glistening; entirely soluble and without taste. 
The specimen was obtained from New York. 
It is evident from the result of these experiments, that the 
two specimens examined, are inferior to those of Christison 
or Guibourt. The second specimen corresponds to the 
" second scammony in amorphous^^ pieces of Pereira. 
Scammony in large regular masses. ( Factitious.) 
Chalky and Amylaceous, 
The first specimen of the kind is in plano-convex cakes, 
four inches in diameter, an inch and a quarter thick, cor- 
rugated on the surface, between the corrugations smooth. 
It breaks with more difficulty than the preceding, but is 
brittle. The fractured surface has a deep greenish (olive)|gray 
appearance, somewhat resinous; masses of resin appearing 
in detached patches ; the exposed surface becoming uni- 
formly darker. It is somewhat porous, the pores minute, 
with here and there shining points or cavities. In mass it 
gives the idea of sap sago cheese. No translucency of the 
edges. The powder is green ash coloured. Odour of cheese 
