300 



THE BEGINNINGS OF LIFE. 



M 



He 



tions a filtered organic solution, favourable for the ap- 

 pearance of ciliated Infusoria, placing the one portion 

 in a tall narrow glass, and the other in a broad flat 

 receiver, so that the former may easily stand in its 



Fig. 69. 



Pouchet's Apparatus for showing that Ciliated Infusoria are 



derived from the Pellicle. 



I 



centre ^. H'e then encloses them both under a bell-jar, 

 dipping into water- so that the deep solution and the 

 shallow solution may be exposed to the same air 



under the on 



bell-glass. 



And he has ascertained 



that^ at the end of four or five days^ with a mean 

 temperature of 68^ F^ a thick proligerous pellicle is to 



^ See Pouchet's ' Nouvclles Experiences sur la Generation Spontanee,' 

 1864, pp. 242-247. . . 



f# 



..depths of < 

 A tkn the c 

 r solutioi 



>ii) 



1 



. !''ilb 



I jtafldance of J 

 the pelli( 

 stence of either 

 ■s, to acjf notabl 

 of hypothec' 

 i and remen 



emonst 



na in the 

 "'unless l,^, 



niention. 



ove- 



^Ptto 



exp 



>S th^. 



T'iofhet 



\, 



^\ 



Uv 



% air 





andt 



t: 



