Secrets of Medical Science
Among the effects of the famous Dr. Boerhave, was a well wrapped and sealed package, with this inscription: “The only and deepest secrets of medical science.” When his library was sold this package brought 20,000 marks. On breaking the seals, the purchaser found nothing but a few empty leaves, on the first one of which was written in large letters, Keep your head cool, your bowels open, your feet warm, and you can laugh at all doctors.