THE BEGINNINGS OF LIFE. 



141 



The forms of Torul^^ however, are almost infinite in 

 variety as they occur in different situations, and they 

 are often notably different even in the same solution. 

 They may vary in size from the minutest visible speck 

 to a vesicle -2 wo" ^^ more in diameter. They may after 



F;g. 47. 

 Different Fomis of Torulce. (Turpin \ ) 



a. Forms from beer, growing in sugar and water {Torula cerevisece). 



b. Forms from beer-wort — early stages of Mycoderma cerevisece. 



c. Forms from filtered apple-juice. 



a time become spherical, ovoidal_, ellipsoidal, or cylin- 

 drical in form. They may be motionless or mobile 2^ 



^ Selected from Plates 3, 4, and 5 of his Paper in ' Mem. de I'Acad. 

 Roy. de France,' 1846. 



^ Torula corpuscles may often be observed to exhibit pretty brisk 

 oscillations when they are small, though the movements generally cease 

 after the corpuscles have attained a certain size. These movements are 

 obviously not ' Brownian ' in character. 



