8 SUGGESTIONS TO TBACHBES. 



cud, a spider spinning its web, a cat catching a mouse, the 

 varied paces of a horse, or the metamorphosis of a caterpillar, 

 will give a fresh zest to the work. If any opportunity offers, 

 the class should visit a menagerie, book in hand, name the 

 animals, and verify the statements of the text. 



The knowledge of the teacher should be sufBcient to fill 

 out and supplement the brief descriptions of a text-book. 

 The following works will furnish additional facts, and aid in 

 further investigations. Pupils may often be persuaded to 

 procure copies as a foundation for their library : Packard's 

 "Guide to the Study of the Insects;" Dana's "Corals and 

 Coral Islands;" Wood's "Natural History," and "Homes 

 without Hands ;" Coues's " Key to North American Birds ;" 

 Baird, Brewer, and Ridgway's " North American Birds ;" 

 Agassiz' " Sea-side Studies ;" St. George Mivart's " The Com- 

 mon Frog;" Allen's "Mammalia of Massachusetts;" Samuels' 

 " Birds of New England ;" Carpenter's " Comparative Physiol- 

 ogy ;" Figuier's popular works on Natural History ; Jordan's 

 "Vertebrates of North America;" Orton's "Comparative 

 Zoology," etc. The back volumes of the "American Nat- 

 uralist," " Popular Science Monthly," and " Harper's Maga- 

 zine" (see Natural History in the Index volume), contain 

 numerous excellent articles, many of them finely illustrated. 

 The above-named books, as well as a microscope, so essential 

 to efficient instruction, can be obtained of the publishers of 

 this work, Messrs. A. S. Barnes & Co., Ill and 113 William 

 St., New York. Specimens of all the typical species of ani- 

 mals, as well as many beautiful casts, are constantly kept for 

 sale by Prof. Henry A. Ward, Rochester, N. Y. 



