Juices. 89

more apt to heat and ferment; which, if it does,the yield of extraö: is much lefs, and its propertiesgreatly impaired,—and that, if the feculencies arethrown away, the medicine is fpoiled. Bot. Arr,Vol. 1. Ed. 2,

It is generally given cautioufly at firft, viz. in do-fes from a grain or two to five grains, in a day, toadults, and augmented graduaily. Sometimes fe-veral drams have been given in that fpace withoutproducing giddinefs. But Dr. Withering fays from5 to 10 gr. of extract, duly made, are a properdofe, and that few conftitutions will bear more with-out experiencing difagreeable effects.

It fhould have been mentioned, page 10, whentreating of the plant, that, if intended to be keptdry, it fhould be put into ftrong brown-paper ba^s,—or, ifpowdered, into glafs phials, — and placedjn a drawer to exclude the ligbt. Withering ibid.

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