300 



THE MICROSCOPE. 



on most rapidly until the supply of food becomes ex 

 hausted ; the vesicles, it would appear, derive their 

 nourishment by the process of osmose, sucking in, as it 

 were, certain portions of the organic fluid and chemically 

 decomposing it, appropriating a part of its nitrogen and 

 throwing off the carbonic acid. If, however, it be placed 



Fungoid growths. 



1, Section from a Tomata, showing sporangiae growing from cuticle. 2, A por- 

 tion of same, detached, to show the mode of budding out from the upper part 

 of a branch. 3, Vertical and lateral views of spores with oospores turned out. 

 C, 7, and 8, Different stages of growth of Mycodcrma cerevisice. 9, Torula 

 diabetica. 



in any adverse condition, it becomes surrounded by layers 

 of condensed material, resulting from the death of the 



