This month (April) you should abstain from hemlock, henbane, deadly mandrake, arsenic sublimate, etc., for most physicians agree that all these plants are more or less unwholesome ...

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Credit: This month (April) you should abstain from hemlock, henbane, deadly mandrake, arsenic sublimate, etc., for most physicians agree that all these plants are more or less unwholesome ... Source: Wellcome Collection.