vi AUTHORITIES CONSULTED. 



my teachings upon the new science and to commend it to 

 parents in prenatal training. 



I have dwelt at some length on psychology, the powers 

 of the soul and the laws of brain building and soul 

 growth, hoping thereby to make the work practical and 

 helpful to all who seek to improve self or others. 



During the fifteen years spent in gathering and devel- 

 oping the subject matter of this work, it has been my con- 

 stant desire to prepare something that would be truly 

 helpful in solving the problems of life and human prog- 

 ress. I have tried to do my work faithfully and consci- 

 entiously. Notwithstanding the many imperfections of 

 this book, I can but feel that were its teachings put 

 into practice they would prove a blessing not only to par- 

 ents and their offspring, but to all ; at least such is my fond 

 hope and sincere prayer. 



Yours in Humanity's Cause, 



NEWTON N. RIDDELL. 



Washington, D. C, 1900. 



AUTHORITIES CONSULTED. 



In the preparation of this work I have consulted many 

 authorities and compared their facts, theories and statis- 

 tics with my own observations. Every quotation used is 

 duly credited to its author. To avoid the use of foot- 

 notes, the principal works consulted, aside from encyclo- 

 pedias, and the Bureau of Statistics, are here listed. I 

 commend them to the student. 



"The Origin of Species" and "Descent of Man" Dar- 



