THE USE OF BOOKS. 315 



larger books recommended here will give the reader 

 an introduction to literature of this kind, which he- 

 should look at when opportunity afifords, although 

 he may not understand it. I suggest this, because 

 I think it is sometimes well for the elementary 

 student to glance at papers, drawings, and diagrams 

 which are intended only for the advanced student, 

 just in order to see the form in which original work 

 is turned out. For this purpose, the reader may look 

 at the volumes of the Quarterly Journal of Micro- 

 scopical Science (Churchill), or the zoological papers 

 included among those published by the Eoyal Society. 



New books come out from time to time. The student 

 should be on the look-out for such of them as may be 

 useful. Reviews of them may usually be found in the 

 pages of Nature, as well as other information useful 

 to the zoologist. Natural Science (Rait Henderson : 

 price Is. monthly) will also be found useful in a 

 similar way. 



It must be remembered, however, that even the best 

 and the newest loolcs on Zoology are always a little be- 

 hind the day. All new discoveries, observations, and 

 theories are recorded in essays communicated to the 

 various learned societies ; and it is often years before 

 they are embodied in text-books. The student whose 

 knowledge is as yet limited to text-books is therefore 

 in a position similar to that of a child at school, who 

 knows the history of England, bat is as yet ignorant 

 of politics, and unacquainted with newspapers, to 

 say nothing of blue-books. It is an advantage for 



