THE SCIENTIFIC INVESTIGATOR. 93 



overlooked not only individually, but in their relation to each other, 

 that the conclusion to which they lead may be lost to sight. One of 

 these propositions is that psychical rather than material causes are 

 those which we should regard as fundamental in directing the develop- 

 ment of the social organism. The human intellect is the really active 

 agent in every branch of endeavor — the primum mobile of civilization 

 — and all those material manifestations to which our attention is so 

 often directed are to be regarded as secondary to this first agency. 

 If it be true that ' in the world is nothing great but man ; in man 

 is nothing great but mind,' then should the keynote of our discourse be 

 the recognition at every step of this first and greatest of powers. 



Another well-known fact is that those applications of the forces of 

 nature to the promotion of human welfare which have made our age 

 what it is are of such comparatively recent origin that we need go 

 back only a single century to antedate their most important features, 

 and scarcely more than four centuries to find their beginning. It 

 follows that the subject of our inquiry should be the commencement, 

 not many centuries ago, of a certain new form of intellectual activity. 



Having gained this point of view our next inquiry will be into the 

 nature of that activity, and its relation to the stages of progress which 

 preceded and followed its beginning. The superficial observer, who 

 sees the oak but forgets the acorn, might tell us that the special qualities 

 which have produced such great results are expert scientific knowledge 

 and rare ingenuity, directed to the application of the powers of steam 

 and electricity. From this point of view the great inventors and the 

 great captains of industry were the first agents in bringing about the 

 modern era. But the more careful inquirer will see that the work of 

 these men was possible only through a knowledge of laws of nature 

 which had been gained by men whose work took precedence of theirs 

 in logical order, and that success in invention has been measured by 

 completeness in such knowledge. While giving all clue honor to the 

 great inventors, let us remember that the first place is that of the 

 great investigators whose forceful intellects opened the way to secrets 

 previously hidden from men. Let it be an honor and not a reproach 

 to these men that they were not actuated by the love of gain, and did 

 not keep utilitarian ends in view in the pursuit of their researches. 

 If it seems that in neglecting such ends they were leaving undone the 

 most important part of their work, let us remember that nature turns 

 a forbidding face to those who pay her court with the hope of gain, 

 and is responsive only to those suitors whose love for her is pure and 

 undefiled. Not only is the special genius required in the investigator 

 not that generally best adapted to applying the discoveries which he 

 makes, but the result of his having sordid ends in view would be to 

 narrow the field of his efforts, and exercise a depressing effect upon 

 his activities. It is impossible to know what application knowledge 



