Herbs as medicine, eye surgery, the hippocratic oath, acupuncture, dissection, human anatomy, dressing wounds and stitches, the circulatory system, the microscope, parasites, the pulse watch, scurvy, the science of pathology, respiration, smallpox vaccinations, the nervous system, the stethoscope, blood transfusions, public health, general anesthetic, the science of epidemiology, preventing infection, the opthalmoscope, the hypodermic syringe, cholera,...