What is the modus operandi of medicines? Do they produce their effects by their action on the blood, as taught by all modern physiologists? Or, do they produce their effects by their action on the organic nervous system, through the agency of the blood? : the latter question considered and affirmatively answered / by John O'Reilly.

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What is the modus operandi of medicines? Do they produce their effects by their action on the blood, as taught by all modern physiologists? Or, do they produce their effects by their action on the organic nervous system, through the agency of the blood? : the latter question considered and affirmatively answered / by John O'Reilly. Public Domain Mark. Source: Wellcome Collection.

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