200 THE MATHEMATICAL TEEORIES OF THE EARTH. 



and the freest avenues for the dissemination of new information; so 

 that we may easily gain the advantage of a concentration of energy 

 without centralization of personal interests. To those, therefore, who 

 can bring the pre-requisites of endless patience and unflagging industry, 

 who can bear alike the remorseless discipline of repeated failure and 

 the prosperity of partial success, the field is as wide and as inviting as 

 it ever was to a Newton or a Laplace. 



