POPULAR SCIENCE MONTHLY. 



Professor Wilhelm Waldeyer, of the University of Berlin, Honorary Vice-president of 

 the Congress for Germany, who gave the address on Human Anatomy. The portraits illustra- 

 ting this article were taken for The Popular Science Monthly by Mrs. Jessie Tarbox Beals, 

 Press Photographer, St. Louis, Mo. 



which their enterprise had erected. Imposing as is the mere array 

 of the visible tokens of progress in material civilization — a progress 

 born of science, nourished by science, and in its turn begetting science — 

 the whole must appear considerably more impressive when seen to 

 be, as it really is, the outer expression of the inner intellectual life of 

 mankind, the index of its vigor and plenitude, and the earnest of its 

 future possibilities. Almost all the departmental exhibits, including 

 manufactures, machinery, electricity, transportation, agriculture, hor- 

 ticulture, forestry, mines and metallurgy, and the like, illustrate di- 

 rectly the progress of applied science, while all, without exception, 

 depend for their existence upon its development. Government and 

 social economy presuppose some kind of philosophy and even a certain 

 amount of knowledge, and both will increasingly apply the methods and 

 results of science. Even the fine arts, quite apart from their technique, 

 appeal to the reason and depend upon criticism. Some of the exhibits 



