INDEX 



415 



Cholera, bacillus of, organisms favour- 

 ing or checking growth, 242, 

 243, 246-249 

 carriers of, 245 

 causes of, 237 



MetchnikofTs and Pettenkofer's 

 experiments in connection 

 with, 240-341 

 definition of word, 237, 238 

 germs, destruction of, 244, 245 

 Indian, active development of 

 sanitation in Great Britain, 

 due to panic caused by, 239 

 date of first appearance in 



England, 238 

 diffusion through water-supply, 



239 

 discovery by Koch of bacillus 



producing, 240 

 epidemic nature of, 238 

 Europeans first attacked by, 238 

 recognition of, by Hindu writers, 



238 



precautions to be observed for 

 prevention of, 244, 245, 246 

 Cholera-bacillus. See Cholera 

 Christmas fare, origin of, 356-358 

 Cilia, animals provided with, and 



action of, 194, 195, 207 

 definition of term, 194 

 uses made of, by unicellular 



animals, 195-197, 207 

 " Cirrhipedes," Darwin's discovery 



with regard to, 23, 24 

 Civilisation, scientific knowledge as 



affecting, 16 

 Clothes moths, 341 

 Coccida, relationship of aphides to, 



323 



Colour, in bird's feathers, 55, 56 

 nature and properties of light as 



affecting, 52-55 



Comets, ancient records of, exaggera- 

 tion in, 227, 229 

 composition of, 234, 235 

 Donati's, imposing size of, 227 

 early superstitions with regard to, 



227, 228 



elliptical orbits of, 233 

 Halley's Chinese astronomical ob- 

 servations relating to an- 

 tiquity of, 230 



length and breadth of orbit, 233 

 length of tail, 227 



Comets continued. 

 Halley's continued. 



predicted recurrences by dis- 

 coverer of, 226, 230 

 recent appearance of, 226, 230, 



236 

 significance of date of return, 



228, 229 

 superstition and consternation 



caused by, 230, 23 1 

 William the Conqueror's "star," 



identical with, 231 

 important, various, 227 

 Milton's reference in Paradise 



Lost to, 228, 229 

 periodic and wandering, distinction 



between, 233, 234 

 photographs obtained at Royal 

 Observatory, Greenwich, of 

 new, 225, 226 

 shooting stars and, connection 



between, 235, 236 

 signification of name, 227 

 superstitions with regard to, 229 

 Correze skull, 371 

 Cromagnards, designation of Reindeer 



men as, reason for, 390 

 Cuba, measures adopted for prevention 

 of yellow fever and malaria 

 in. 2 , 3 



Darwin Centenary Celebration at 



Cambridge, 18, 33, 38 

 Darwin, Charles 



comparison between theories of 

 Lamarck and,-i9, 20 



connection with University of 

 Cambridge, 36 



establishment of " natural selec- 

 tion " theory, 34 



extent of time spent in experi- 

 ments and observations, 18- 

 19, 22-23 



friendly relations between Wallace 

 and, 13, 37 



geological discoveries of, 24 



Henslow's influence upon, 36 



"Natural selection" theory ex- 

 plained, 27-29 



study of disease influenced by 

 discoveries and research of, 

 39. 40 



Darwinism (Wallace), 15, 16 (quota- 

 tion) 



