HISTOLOGY. 19 



the function, and the spores (or seed of cells). W;e 

 use the plant cells because they are very large and are 

 easy to obtain and possess all the properties of the ani- 



CBLLS OP BREWERS' YEAST. 



1, A group of two cells; 2, dark spot represents a vacu- 

 ole; cell forming a bud. 



mal cells. The size of the yeast cells is 1-4000 to i- 

 2500 of an inch in diarneter. Their form is ovoidal. 

 They have the power to produce fermentation. In 

 studying the plant under the microscope you will do 

 well to note whether there is any chlorophyll in the 

 plant or not. In this way you will be able to make your 



