PERMEABILITY AND CLASSIFICATION 113 



before shrinkage and hardening have begun that offers to these fungi 

 their opportunity (p. 107). 



(9) After remarking that the connection between permeability 

 and insufficient shrinkage has been established in this chapter, the 

 author proceeds to discuss Dr Gola's view connecting impermeability 

 with immaturity and shows that his theory cannot be sustained 

 (p. 109). 



(10) The reader is reminded that many features in the behaviour 

 of permeable and impermeable seeds, especially those concerned with 

 their capacity of absorbing water from the air after being exposed to a 

 temperature of 100° C, will be elucidated in subsequent chapters, 

 particularly in that on Hygroscopicity (p. 1 1 1). 



