394 



EXPEEIMENTS WITH PLANTS 



217. Portion of the mycelium, showing the immature spore-cases (white) and 

 mature ones (black). 



spore -cases. Why do they appear first at the edges of 

 the slice (has the amount of moisture anything to do 

 with it) ? Does the Mould grow better in the light or 

 in the dark ? What effect has temperature on its 

 growth? Does it produce carbon dioxide? (Grow some 

 in a closed jar with a bottle of lime-water.) 



