FILM FOn.MATIOX. 



»2S 



ili.scluirge (^ 248) fiom elm, and Inter hi well - water by 

 J. KuEULEH (1.). 



Till* sfpurute stages of tlio dovflopinent of film were closely 

 iiivc>;tigatfil in four species of hottijui-feiiiientiition ye:ist by 

 II. Will (VI II.). At the outset no tlillerence can We cleteeted 

 between the cells of the seilimental yeast and those retained 

 floating on the siufaee by Hakes of albumin and residual frag- 

 ments (»f the •• head," and from which the development of the 



KlO. 1J7.— Cells of SfdiiiK'Htnl 

 yca«t from a wort i-ulturc 

 of- 





9-0 



>-§s 



0, 



^.i-®.3 



oa 



^ o 



PoQ,Oo9 



o o 



Kl<!. 13S. — Kilni cells of the flr«t 

 generation, and |>ennanent cells 

 from the nini of a wort culture of — 



Bottoni-fermcntatlcn beeryeait No. 93 of the Muniih Ilrewinc Station. Masn. r<io. 

 (A/Ur Will.) V, ,> 



yeast i.slets originates. Later on, however, it is ob.served that 

 these floating cells produce daughter-cells, the chief feature of 

 which — as may be seen from a comjiari.son of Figs. 137 and 

 13S — is that, instead of appearing singly or in pairs on the 

 mother-cell, as they do in the seilimental yeast, a number 

 are formed simultiineously thereon. They are al.so much 

 smaller (»■.;/. only 7 /i as compared with 10 ft) than tho.se in the 

 sedimental ye.ist. ai-e oval or s.iu.sjigo shaj>ed, and in t>n-n pro- 

 duce similar daughter -cells, the whole remaining conntH."t<Hl 



