GERMINAL OH LIVING MATTER AND FORMED MATERIAL OF COMMON 



MILDEW. 



In this drawing the germinal or living matter of mildew duiing growth is represented. The figures 

 have been copied from specimens well stained by immersion in carmine fluid, a, spores protected 

 by a thick layer of formed material. 6, smallest particles of germinal or living matter within ; any 

 one of these minute particles might grow, c, a spore bursting ; germinal matter escaping, d, a spore 

 enlarged by growth, e, a spore sprouting. /, an old spore, the formed material of which has b<-en 

 much thickened by the formation of new layers within. The remaining figures show the growth of 

 the long filaments (mycelium) and the fructification of the fungus. It will be noticed that in all 

 these changes the germinal matter only takes part. The formed material is perfectly passive, and 

 does not GROW. Magnified 17CO diameters. 



lOOCth of an inch 



