78 THE NATURALIST'S GUIDE. 



mean that the nest is No. 29, and the egg is the No. 4 of 

 that nest ; both of these numbers will refer to a book, 

 where all the particulars of the finding of the nest, the 

 locality, measurements of the nest, eggs, etc. in inches, 

 are recorded. 



The method of preparing a book like that referred to 

 above may be seen in the following specimen : — 



a 

 o 

 o 

 CO 



