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Another point to notice is that we have not only to allow of 

 the presence of unconscious mental activity, hut we have also to 

 allow that it is difficult to say quite where it begins and ends. 

 The experience of sleep and dreams and the consideration of our 

 common acts of will and imagination as well as those of atten- 

 tion all combine to show that the conscious activity of mind 

 rounds off gradually and imperceptibly into the unconscious. 

 The implications and consequences of the admission of uncon- 

 scious mental activity count for something in many different 

 directions. Autobiographies, books on logic, works of fiction, 

 confessions of mystics, all contribute material to the study of the 

 subject. 



WEDNESDAY, FEBRUARY Uth, 1900. 



Dr. C. H. draper. 



SOME examples of rhythmic motion are familiar to everybody. 

 The motion of the waves of the sea, the ebb and flow of 

 the tide, the beating of one's pulse are instances. The tides are 

 a most interesting instance of one of Nature's cycles. The 

 moon by her attraction heaps up beneath her 22,000 cubic miles 

 of water and this huge lump follows her perpetually round the 

 world. Y'et not altogether perpetually. Every activity contains 

 within itself the source of its own change, and slowly but surely 

 the motion of the tides is stopping the motion of the world. 

 They act as a brake on this revolving earth, and in consequence, 

 one day, there will be no more days and nights and no more tides. 

 But there are rhythmical processes which more intimately 

 concern us. Those for instance by which we hear and walk and 

 talk. In fact, on rhythmical motion most things human depend. 

 Before us is a pendulum swinging. The pendulum of an 

 ordinary eight-day clock moves from side to side in one second. 

 Could we move our hands backwards and forwards thirty times 

 in a second, that motion would produce a low musical note. 

 Look at the beating of the heart. " The heart contains within 

 itself a something," says Huxley, " which causes its different 

 parts to contract in a definite succession and at regular intervals." 

 This successive contraction of the chambers of the heart takes 

 place for each of us 37 million times per annum. 



