This section is from "The Domestic Encyclopaedia Vol1", by A. F. M. Willich. Amazon: The Domestic Encyclopaedia.
Arcanum, strictly speaking, signifies any thing which is involved in mystery; but, in physic, it more usually denotes a remedy, the preparation of which is industriously concealed, either to enhance its value, or increase its reputation among the vulgar. - See Nostrum, and SPECIFICS.
 
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