Note 326 — PHARMACOLOGIA.

I apprehend that the superior power of animal charcoal, over that of vegetable origin, in removing colouring matter, depends upon the peculiar texture of the former. At the same time it must be acknowledged, that there are certain phenomena which would appear to indicate the existence of a chemical difference in these substances; thus if Lime water be boiled with animal charcoal, the whole of the lime will be abstracted from the water, whereas the same effect is not produced by the action of charcoal of vegetable origin. See Liquor Calcis.