INDEX. 



XXXV 



oxidation of blood, i. 48 ; trans- 

 mutation of physical force into, i. 

 67 ; no evidence for existence of a 

 special, i. 83 ; relation of food to, 

 ii. 183. 



Vital processes, effect of light and 

 heat upon, i. 16 ; amenable to 

 physico-chemical laws, i. 54 ; in- 

 explicable nature of most inti- 

 mate, i. 55, ii. 256, 534; analogy 

 of fermentation to, i. 425, ii. 186. 



Vorticellae, mode of origin of, ii. 

 252 ; from Euglense, ii. 464; from 

 Algoid-vesicles and Moss-sporan- 

 gia, ii. 469 ; other modes of ori- 

 gin of, ii. 469 ; from filaments of 

 Nitella and Chlamydococcus cor- 

 puscles, ii. 470 ; by synthetic 

 Heterogenesis, ii. 471 ; metamor- 

 phosis of, into Oxytricha, ii. 493 ; 

 into Rotifers, ii. 502, 511 ; origin 

 of, from Actinophrys, xcv ; rela- 

 tions of, to Acinetse, xcv ; conver- 

 sion of, into Actinophrys, xcv. 



Wallace, Mr., on natural selection, 

 ii. 5/4; on means of changing 

 colour in feathers, ii. 597 ; test of 

 true theory, ii. 604; age of human 

 race, ii. 629; development of brain 

 in man, ii. 630 ; future of human 

 race, ii. 633. 



Watson, Sir Thomas, on non-suscep- 

 tibility to contagion of small-pox 

 and measles, cxlix. 



Winter-eggs, of Hydatina senta, ii. 



5I4- 



Wyman, Prof. Jeffries, experiments 

 relating to origin of living matter, 

 i. 435 ; on analogical evidence 

 concerning origin of living matter, 

 i. 471 ; on atmospheric germs, ii. 

 282. 



Zooids, ii. 542, 553. 



Zoospores, mode of origin of, in Al- 

 gae, i. 171 ; formation of, in Vau- 

 cheria, i. 173; in Achlya, i. 180. 



