Bibliography 201 
the Ice Age by Reginald Daly, Yale University Press, New 
Haven, 1934. 
As the reader branches out into some field which partic- 
ularly interests him, he will come across further references to 
look up and gradually he will become familiar with the lit- 
erature of that domain. Reference to the subject cards of a 
library catalogue will be found helpful. There are also ex- 
cellent articles on many particular subjects in the Encyclo- 
paedia Britannica. 
