EDITORIAL MENTION OF SCIENTIFIC FIRMS, ETC. 



25 



Ward's Natural Science Establishment. 

 The half page announcement of this old established firm should be con- 

 sulted by our readers. The firm has the largest and best collection of rocks, 

 minerals, fossils and animals to be found anywhere. Special attention is 

 called to the Systematic Collections of this firm, illustrating in a progressive 

 manner, the course of life from the lower to the higher animals. Write 

 them for particulars and prices. 



" Natural Science Readers." 



We wish to call the attention of our readers to the advertisement of 

 N. L. Wilson, found in another column of this journal ; it will pay you to 

 send to him for such specimens you may desire. 



We will appreciate the mention of "Nature Study" by readers who 

 have occasion to order of firms whose ads. appear in our columns. 



We shall be glad to answer any questions upon scientific subjects 

 which teachers and others may wish to ask. 



Figure 17. 



Bronze Grackle. Massachusetts. 



