INDEX 



Amoeba, term applied to proteus 



animalcule, 194 

 Andrews, discoveries of, with regard 



to ozone, 252 



Animalcules, bell, unicellular struc- 

 ture exemplified in, 197-199 

 ciliated unicellular, graceful move- 

 ments of, 207 

 dried, examples of "suspended 



animation " in, 168, 169 

 proteus, processes of protoplasm 



in, 195 

 sun, processes of protoplasm in, 



X 95 

 unicellular plants and, essential 



differences between, 204- 



207 



Animals, aquatic, excess of egg pro- 

 duction to ensure survival to 



maturity, 143, 144 

 aversions and cautious proceedings 



of, 269 



blindness of, congenital, 272, 273 

 colour-protection and invisibility 



of, 304, 312 

 ' ' concealment " and ' c warning ' ' 



marks, distinction between, 



310-313 



destructive invasions made by 



various, 339, 340. 

 devices adopted for protection of 



young by, 138, 139, 144 

 domesticated, reasons for continued 



congenital defects in, 271, 



272 



hibernation of, 165, 166 

 lower, various thread-producing, 



293. 294 



mankind and, causes of congenital 

 defects in, 273 



Animals continued 



parthenogenetic powers possessed 

 by certain, 330, 331 



poisonous, methods of self-protec- 

 tion used by, 101 

 "warning" coloration pos- 

 sessed by, 107 



propagation of, 132-137, 144-145, 

 329-330 



sleep of, salient features connected 

 with, 161-164 



structure of multicellular and uni- 

 cellular, comparisons be- 

 tween, 207-208 



unicellular, uses made of cilia by, 

 194-197, 207 



wild, congenital defects less ob- 

 vious in, 271, 272 



wood-boring, 346, 347 

 Anopheles Gnat, 3 

 Ants, aphides and, friendship 



between, 324, 325 

 Aphides 



enemies of, 319, 325 



hop-blight caused by species of, 

 317,31? 



parthenogenetic propagation of, 

 326-327, 330, 334, 336 



rapid propagation of, 326, 338 



relationship of Coccida to, 322, 



.323 



secretive productions of, 323-325 

 various species of, 322 

 Archaeology, discoveries in connection 

 with pre-historic man, 371 

 372, 39i, 394-395, 398, 400, 

 402 



Art, knowledge compatible with, 45 

 Astronomers, stupendous nature of 

 work, 224 



