440 ANj>njAL REPORT SMITHSONIAN INSTITUTION, 1955 



It is obvious that nerve impulse is somehow converted into thought 

 and that thought can be converted into nerve impulse. And yet all 

 this throws no light upon the nature of that strange conversion. 



Before certain problems the scientist will always stand in awe. Per- 

 haps he may be forced to make another approach — to what was called 

 in old time "the heart." However far our successors in these studies 

 may go, it is my belief that the machine will never fully explain the 

 man, nor mechanisms the nature of the spirit. 



Reprints of the various articles in this Report may be obtained, as long as 

 the supply lasts, on request addressed to the Editorial and Publications 

 Division, Smithsonian Institution, Washington 25, D. C. 



