HUMAN AND ANIMAL PHYSIOLOGY. 83 



and trainiug of the child, — in multiplying and regulating the 

 comforts of home, in improving the modes of education, in 

 adapting the fashions of the day to the laws of life and health, 

 in correcting many evils connected with our public institu- 

 tions, — in demonstrating the great fact that all codes of morals 

 and developments of religious character, in order to be what 

 the Creator intended, must harmonize with the laws of the 

 physical system. Upon each and all of these topics the prin- 

 ciples of physiology are destined to have a powerful and most 

 beneficial influence. When the public mind becomes properly 

 enlightened upon these points, the great law of inheritance 

 will stand out as one of the most prominent agents in the ad- 

 vancement of the race. It cannot be that the most important 

 law in the universe for the permanent improvement and ele- 

 vation of man should always be so imperfectly understood or 

 so generally ignored. Such ignorance and violation of law 

 cannot always continue. Judging from the history of other 

 sciences, and from the rapid changes taking place in almost 

 every departnuent of society, we predict that in the next fifty 

 or one hundred years there will be found in the direction here 

 mentioned the most surprising improvement. I am fully 

 aware that there are difficulties in the way of making a com- 

 plete or perfect application of this law to the human species ; 

 but then these difficulties are not insuperable. Just in pro- 

 portion as the rays of light and truth break in upon this field 

 of inquiry, the clouds of ignorance and prejudice will dis- 

 appear. If there are such important laws, a knowledge and 

 observance of which are indispensable to the highest welfare 

 of the race, a way will be provided whereby they can be cor- 

 rectly understood and obeyed. 



While many of the laws of inheritance are the same in the 

 human race as in the other animal races, there are three great 

 points of difference between them. And these points of differ- 

 ence are. radical, fundamental and fixed ; and in making an 

 application of the law, their existence and influence must be 

 taken into account. 



DIFFERENCE IN INHERITANCE ; HUMAN AND ANIMAL PHYSIOLOGY. 



The first distinction is reason and instinct, or the intellectual 

 and moral nature of man, — that all the faculties which distin- 



