VITAL STATISTICS. 



355 



rangernents for his fast; and when lie began his experiment his weight 

 was 157 pounds. He weighed 121 pounds on the day his fast ended. 

 He had therefore lost 62 \ pounds since he came to the city, and 3(3 

 pounds since he began his fast. Dr. Hammond, the well-known New 

 York physician whose assertion that a forty days' fast was a physical 

 impossibility led Dr. Tanner to make the attempt, came out in "a card 

 in the New York papers declaring that he believed the fast had been 

 fairly conducted. 



On each day of his fast Dr. Tanner weighed as follows : 



Cavities of the Body. 1. Mucous cavities (open to the external 

 air). Digestive tube, respiratory passages, genito-urinary passages, ex- 

 ternal and middle ear, etc. 



2. Serous cavities (closed). They may all be said to be lymph cav- 

 ities. They are the lymph spaces throughout the body, and the large 

 spaces, called the pleural cavity around the lungs, the pericardial cavity 

 around the heart, the peritoneal cavity in the abdomen, the arachnoid 

 cavity around the brain, and a similar one along the spinal cord. 



3. Synovial cavities in the joints. 



4. Blood cavities, the inside of the heart and blood tubes. 



5. Secretion cavities, the cavities and tubes from the glands ; for 

 example, the bile sac and its duct. 



6. Bone cavities. 



