PLANTS WHICH CAUSE DECAY 



395 



Sow some spores in a hanging drop, as shown in 

 Pig. 165, and observe their germination. They grow 

 well in the sweetened 

 juice of stewed apricots, 

 in water in which hay 

 has been boiled, or in 

 sweetened water. Spread 

 a thin layer of 

 nutrient gela- 

 tin (see page 

 369 ; ordinary 

 gelatin sweet- 



anckrl ^xrill Ar\ 218. Black Mould of bread, showing the manner in which the 

 eneU win UO, mycelium sends out root-like branches at short intervals: 



or even a little ^^^^ t^^^Q places spring long stalks bearing spore-cases. 



clear apple or other fruit jelly) on a slide, sow the 

 spores in it, and keep the slides in a moist atmosphere 

 (for this purpose they may simply 

 be laid on top of the bread culture 

 in the pan or placed in a special 

 pan on a support to keep them 

 from contact with the water in the 

 bottom of the pan). We may re- 

 move the slides from time to time 

 and observe the development of 

 the Mould ; since they are injured 



219. A single spore-ease of bv exDOSurc to dry air it is better 



the Black Mould of bread, J t- J 



(cr^^cem-'sSaped^S^sIc- ^^ ^^^^^ ^ uumbcr of slldcs, one of 



tion) in which the spores 

 (s) are contained. 



which may be removed each day. 



