

of atmospheric oxygen. Indeed the theories of respira- 

 tion now current regard free oxygen as unnecessary for the 

 essentials of the process. important reactions are 

 "believed to he enzym&tic splittings of carbohydrates and 

 the like, and oxygen is regarded as necessary only for t 



1. On anaerobic excretion of carbon dioxide and 

 other respiratory products see alladin, Kostytschew and 

 ITabokikh; loci citati in last note. On protoplasmic stream 

 ing in the absence of oxygen see Lopriore,- Jahrb. wiss, 

 Bot. 28_: 576 (1895); Ewart,- Jour. Linn. Soc. Bot. 31: 

 420 (1896), 33: 123 (1897); Farmer,- ^hn. Bot. 10: 288 

 (1896); Zuhne,- Zeits. Siol. 35: 43 (1897), 36: 1 (189 , 

 fcer,- Zeits, Biol, 36 : 351 (1898); Gelakowski,- Bull, 



Acad. 3ci. de Bohme : (1898). On movements of 



Brosera and Mimosa in absence of oxygen see Correns,- 

 JPlors _75: 87, 144 (1892), On other movements see Gelakowski 

 loo, cit . In general growth will not occur in the absence 

 of oxygen hut slight anaerobic growth has heen observed 

 in seedlings o f He li an thus annuus: HTieler^- Unters, bot. 

 Inst. [Tubingen 1: 200, 223 (1883); Habokikh,- Lot. Centbl., 

 Beih. 13: 272 (1902). Kabokikh ( loc . cit.) and Gzapek,- 

 Jahrb, wiss. Lot. . 7 : 277 (1895), 



