10 
ESSAY ON SCAMMONY. 
marked. Taste marked and disagreeable. It cakes in the 
mouth and forms a shght emulsion. When rubbed with 
the moistened finger, affords some milkiness. It contains 
Resin, .... 40.50 
Aqueous Extract, . . 9.00 
Earthy Matter, . . . 6.00 
Vegetable Matter, . . 32.00 
Loss, .... 12.50 
100.00 
It slightly effervesces with muriatic acid, (chalk) and is 
deeply turned blue by iodine, (starch.) 
The specimen was imported in 1836. It corresponds, I 
think, with "i3. Second Scammony " of Pereira. At pre- 
sent I can find none of it in the market. 
It is the article described at page 643, U. S. Dispensatory, 
ed., 1846. 
The second specimen, in form, resembled the preceding ; 
it is in plano-convex cakes, five to six inches in diameter, 
and in thickness, one and a quarter to one and a half inches. 
The exterior is rough and dirty ash brown ; the fractured 
surface is dull, but in a clear light presents very minute 
shining particles ; it is greenish brown, presenting white 
chalky points, and pores. The consistence is firm, a little 
force being necessary to reduce it to powder ; powder, ash 
brown, rather than green. It has a cheesy odour; a disa- 
greeable taste, and forms an emulsion in the mouth ; it is 
somewhat gritty between the teeth. It contains 
Resin, .... 45.00 
Aqueous ext. (gum.) . . 7.50 
Earthy matter, . . . 12.50 
Veg. matter, destructible, . 30.00 
Loss, .... 5.00 
100.00 
It effervesces briskly with muriatic acid, and is turned 
