DUAL CHARACTER OF THE BRAIN. 19 



cution with the left arm, just as most people who are right- 

 handed obtain execution of movement with their right arm. 

 These facts, therefore, are decisive in favor of the view that I 

 have for my object in this lecture. 



The third point of importance is that with a given number 

 of individuals, out of 100 examined by Dr. Wm. Ogle, who 

 were left-handed, four only had learned to write with the left 

 arm. They had been taught by their parents, although they 

 were left-handed, to make use of the right hand to write, and 

 their writing with the left arm, the author states, was very 

 clumsy. In one of the cases he had to learn the facts from 

 what the patient had to say; the patient being paralyzed in 

 the left hand, he could not write ; but in the others he had the 

 proof, and could see. Therefore, the left side of the brain, even 

 in persons who are left-handed naturally — even in persons who 

 make use chiefly of the right side of the brain — can be educated 

 so as to produce a very good handwriting instead, and better 

 than the writing by the left arm. 



The fourth point of importance is one on which I shall not 

 dwell, as it implies a knowledge of medicine that you have not, 

 but I shall state it in only a few words. It is exceedingly rare 

 that the leg is affected to the same degree by paralysis as the 

 arm, and the leg, as you well know, is not a part which we 

 develop as much in its movements as we do the right arm. If 

 a patient is struck with paralysis, for instance, on the right side 

 of the body, owing to a disease of the left side of the brain, he 

 will lose more, if he does lose movement at all — he will lose 

 more of it in the right arm which he has been accustomed to 

 train than in the right leg. But, I repeat, that this argument 

 cannot be understood well except by medical men. I pass it 

 over therefore. 



There is no reason whatever to object to our teaching children 

 to make use of the two sides of the body. If j'ou have been 

 convinced by the arguments I have given that we have two 



