1Rush’s Directions to Meriwether Lewis for Preserving Health, 11 June 1803 (Jefferson Papers)
Dr. Rush to Capt. Lewis . for preserving his health. 1. when you feel the least indisposition, do not attempt to overcome it by labour or marching. rest in a horizontal posture.—also fasting and diluting drinks for a day or two will generally prevent an attack of fever. to these preventatives of disease may be added a gentle sweat obtained by warm drinks, or gently opening the bowels by means...