REVIEWS AND BOOK NOTICES. 629 
How a mind trained in logic and the methods of exact science 
looks upon the theory of evolution, may be seen from the following 
extract :— 
_ We now perceive that the ultimate system will.be an almost 
Infinitely extended genealogical tree, which will be capable of 
mensely great, beyond all possibility of separate treatment, 
“Clentific men have ea mene at some convenient but arbi- 
fach other as to present no constant difference were all of one 
Main They have, in short, fixed their’ attention entirely upon the 
n features of family difference. In the genealogical tree which 
rrr 
“Swainson, ‘Treatise on the Geography and Classification of Animals,’ *Cabinet 
®dia,’ p. 201, 
Cyelop, 
