More than ever, physicians try to discover the cause of disease. Great discoveries have been made and for a number of diseases certain bacilli have been found to be the specific agents. More than ten years ago it was believed that such a bacillus had been discovered as the direct cause of pneumonia, and many consider pneumonia to-day an infective disease caused by a diplococcus. Still it is a relatively rare occurrence that this bacillus pneumoniæ is found in pneumonia, and the riddle of the nature of this disease is by no means solved.
If I am ready now to bring indirect proofs of the nature of pneumonia before you, without referring to bacillar origin, I am induced to do so from the extraordinary exactness of such proofs. We understand that under the heading of pneumonia a number of different forms of this disease are included and we have reason
RICHTER CM. INFLUENCE OF ATMOSPHERIC PRESSURE ON THE PREVALENCE OF PNEUMONIA.Read in the Section on Practice of Medicine, at the Forty-fifth Annual Meeting of the American Medical Association, held in San Francisco, June 5-8, 1894.. JAMA. 1894;XXIII(5):188-192. doi:10.1001/jama.1894.02421100016002e