REVIEWS AND BOOK NOTICES. 
Tue PRINCIPLES OF Scrence.*—Though each scientist, whether 
consciously or not, does his work on principles underlying all 
useful and durable efforts, yet the methods have been gradually 
developed, and the laborer in one department may be ignorant 
of the’ mode of procedure in others quite remote from his line of 
study. The author discusses the methods common to all the sci- 
ences, though with a bias towards physical science, particularly 
physics, chemistry and astronomy. As a result we have a boo 
which we are sure will win the sympathy of the reader, as it is an 
earnest and sensible treatise. Wherever we have opened the vol- 
ume we have been attracted by the interest and clearness of the 
style, and the general tone of the discussion which, though on the 
whole conservative, is in full accordance with the spirit of modern 
science. . 
The chapters on the use of hypothesis, and the character of the 
experimentalist are capital. Professor Jevons boldly says “ it is 
wholly a mistake to say that modern science is the result of the 
Baconian philosophy ; itis the Newtonian philosophy and the New- 
tonian method which have led to all the great triumphs of physi 
science, and I repeat that the ‘ Principia’ forms the true ‘Novum 
Organum.’” If we mistake not, the theory of evolution, as sug- 
gested by Lamarck, Spencer, Darwin and others is a result of the 
Newtonian rather than the Baconian method; certainly it may be 
said in its present’ stage to be a “hypothetical anticipation of 
nature,” valuable as it is as a means of research. 
In the chapter on Classification the author states his belief that 
‘a natural classification is an “arrangement which would display 
the genealogical descent of every form from the original life germ 
Those morphological resemblances upon which the classification 
of living beings is almost’ always based are inherited resem- 
blances, and it is evident that descendants will usually re mble 
neir parents and each other in a great many points.’ Muc 
ance is given to the bifurcate or dichotomic arrange 
universally used in descriptive biology. 
por pe emer 
* The Principles of Science; a treatise on Logic and Scientific Method. P3 ss 
Stanley Jevons. Special American Edition, bound in one volume, New Yor 
Millan & Co., 1874. 8vo. pp. 480. 
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