PART IV 

 MICROBES AND OTHER DISEASES 



CHAPTER LXI 



THE MICROBE OP APPENDICITIS 



THE appendix is one of the Rudimentary Organs. 

 A large number of these organs are found both in 

 Man and the lower animals. They are organs once 

 well developed, now dwindled to mere nothings. 

 Their dwindling may require untold generations. 



The cause of dwindling is disuse. The organ not 

 used becomes smaller and smaller, finally vanishes. 

 Some birds migrate from the mainland to lone 

 islands in the ocean. Here they are away from 

 enemies and therefore do not need wings for rapid 

 flight. Unused, their wings, through many genera- 

 tions, dwindle to mere fragments. The birds can 

 no longer fly. 



Some fishes in dark caves have no eyes. Before 

 introduced to the caves, their eyes were well de- 

 veloped. Once in the darkness, they could not use 

 their eyes. Their eyes dwindled, vanished. 



In the evolution of the lower animals, as higher 

 and higher species are evolved, they do not need 

 certain organs needed and used by the lower 



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