PREFACE. 
and pleasant language. Throughout the whole book 
I availed myself freely of the leading popular works 
on science, but found it impossible to give special 
references, as nearly all the matter I have dealt with 
has long ago been the common property of scientific 
teachers. 
In the present edition Mr. Carter Beard has made 
some alterations so as to give examples more familiar 
to American children, and he has helped me to bring 
some of the subjects more up to date. There are also 
several new illustrations. 
ARABELLA B. BUCKLEY. 
