James Parton,
Smoking and Drinking
“ What does a glass of wine do to us when we have swallowed it? We should naturally look to physicians for an answer to such a question; but the great lights of the profession—men of the rank of Astley Cooper, Brodie, Abernethy, Holmes—all assure the public, that no man of them knows, and no man has ever known, how medicinal substances work in the system, and why they produce the effects they do. Even of a substance so common as Peruvian bark, no one knows why and how it acts as a tonic; nor is there any certainty of its being a benefit to mankind. There is no science of medicine. ”
