SLEEP ANT) 11RKAMS. 



83 



from potentiality through actuality, so sleep may perhaps 

 bo said to bo the passage from actuality to potentiality. 

 Although, like other problems in physiology, the furtlior 

 it is yinshed the more it baffles us, yet wo ought constantly 

 to make the attempt to master its problems, because they 

 throw light on many other phenomena of our existence, 

 n,nd will eoutinuo to bo food for thought until "human 

 time itself shnJl close its eyelids." 



