2o8 THE ENGINES OF THE HUMAN BODY 



breakfast have also passed through the small bowel at the 

 usual pace, and were added to the bismuth-laden contents 

 of the great bowel before bed-time. The " tailings " of 

 a day's meal spend the night which follows in the final 

 laboratory of the alimentary tract. In the second factory 

 the intestinal contents were hurried along ; but here, in 



OESOPHAGUS 



LIVE ft 



PYLORUS 



DUODENUM 



ASCENDING 

 COLON 



CVC CUM 



STOMACH 



TRANS VERSE 

 COLON 



UMBILICUS 



Beginning of 

 JEJUNUM 



DESCENDING 

 COLON 



APPENDIX 



ILEUM 



RECTUM 

 SPHINCTER 



\ 



VENT 



Fig. 43. — Shadow of the great bowel twenty-four hours after a bismuth breakfast. 

 The hours indicate the advance of the meal along the bowel. (After Hurst. ) 



the final stage of their treatment, they are purposely 

 delayed. Clearly a method of treatment of quite another 

 kind is applied to them in the great bowel. 



We examine our friend from time to time during his 

 breakfast. The shadow outlines of his great bowel alter 

 so slowly that we can detect the changes which take place 

 only by comparing the picture of one phase with another 

 taken five minutes later. But if we place our ear over 



