3i6 Edward Livingston Youmans. 



The Popular Science Monthly has now been with 

 us more than twenty years, its founder's mantle hav- 

 ing fallen upon his younger brother, Dr. William Jay 

 Youmans, by whom it is now edited. Its character 

 has always been of the highest, and it has exerted 

 an excellent influence not only as a diffuser of valu- 

 able knowledge, but in training its readers to scientific 

 habits of thought in so far as mere reading can ever 

 contribute to such a result. 



