WHAT BIOLOGY TEACHES. 11 



an order (or law) of its own kind. Dr. Noah Porter, 

 President of Yale College, in his work on the " Hu- 

 man Intellect," devotes an entire chapter to prove 

 that life and soul are synonymous words, and apply 

 to all living things. The writer of the present work, 

 in the volume entitled " The Science of Life," regards 

 life, not as identical with soul, but as the sum of the 

 activities resulting from the union of mind and mat- 

 ter. Those who desire to study the subject more 

 thoroughly are referred to those works. 



