ADM'IMIOX 33 



Mosses, lichens, aiul W\\v^\ we are familiar 

 with everywhere in the country, but below these 

 a.^ain are such l,mo\\ ths as the L;"reen stain ' w-hich 

 makes the tree trunks in moist places as brilliant 

 in colour as the lea\es theinselves. Looked at 

 throui^h a lens we see the c(jlour arises from a 

 ^M-owin^- plant of extremel)' simple form, little 

 more in fact than a succession of cells, each living 

 and increasing " after its kind." 



Again, if we consider the process of fermenta- 

 tion, we find that wlien it is set up in a cask of 

 wine its action is due to the growth of a minute 

 N'cgetable that feeds uj^on the alcohol and sugar, 

 and b\- robbing tlie wine of those two elements 

 turns it into vinegar or acetic acid. 



A somewhat similar growth causes the thick 

 jell)'-like substance we sometimes find in our ink- 

 glass when it has been allowed to remain too long 

 without renewal ; the minute germs floating in the 

 air ha\e found the ink suitable to them, and thus 

 their mxcelium ~ begins to form at the bottom of 

 the glass, to the great discomfort of the writer. 



The j'cast with which our bread is fermented is 



' Protococcus. l"ii>,l lonn of hmijditl grovvtli. 



