THE GENEEAL 



these masses of p 

 two, or may be en 

 the gigantic seawe 

 trees which abound 

 Whether the pi 

 same fundamental arr 

 certain number of p: 

 each other, supported 

 shows a wonderful variety 

 depending on the manner of life o 

 which it forms so large a part. In 



PLANTS 3 



small as 



Fia. 3. FIGURES OF DIFFERENT BACTERIA. 

 (After Cohn and Sachs. Very highly magnified.) 



1, Sarcina ; 2, Bacillus ; 3, Spirillum ; 4, Spirillum with flagella ; 

 5, 6, 7, Micrococcus. (Single, in strings, and in groups.) 



protoplast is usually found occupying a particular cavity 

 which is formed by its cell-walls, and communicating with 

 its neighbours on all sides by delicate prolongations of 

 living substance which extend through the walls of con- 

 tiguous chambers. Each chamber is often called a cell, but 

 it is preferable to restrict this term to the protoplast which 

 occupies it. 



In dealing with the physiology of the plant, it is the 

 living substance which should first engage our attention, 

 though the arrangements of the supporting structures or 

 skeleton exhibit the greatest variety. We have seen that 

 in the simplest forms of plants the living substance may 



1* 



