298 BIRD FRIENDS 



For Grammar Grades - 



Burroughs, Songs of Nature. Doubleday, Page & Co., Garden 



City, N.Y. $1.35. 

 Lovejoy, Poetry of the Seasons. Silver, Burdett & Co., Boston. 



$.60. 

 Williams, Through the Year with Birds and Poets. Lothrop, Lee & 



Shepard Co., Boston. $1.00. 



Below are suggested a few books for the children's 

 library, which are written in a style that children 

 can understand : - 



Burroughs, Bird Stories from Burroughs. Houghton Mifflin Co., 



Boston. $.60. 



Gould, Mother Nature's Children. Ginn & Co., Boston. $.60. 

 Johonnot, Neighbors with Wings and Fins. American Book 



Co., New York. $.40. 



Miller, First Book of Birds. Houghton Mifflin Co., Boston. $.60. 

 Miller, Second Book of Birds. Houghton Mifflin Co., Boston. 



$1.00. 



Stickney and Hoffmann, Bird World. Ginn & Co., Boston. $.60. 

 Walker, Our Birds and their Nestlings. American Book Co., 



New York. $.60. 

 Wright, Gray Lady and the Birds. Macmillan Co., New York. 



$1.00 (school edition). 



Arithmetic and bird-study. Some problems in 

 arithmetic relating to the number of insects eaten 

 by birds, the numbers of birds, and other topics may 

 be given the children. A few are here suggested: 



A. Problems on the number of insects eaten by nestlings. 



1. A pair of wrens were observed to feed their young 17 times 

 in an hour. The parents fed their young from 5 A.M. till 8 P.M., 

 and the young remained in the nest 15 days. Assuming that 

 one insect was brought at each visit, how many insects were 

 destroyed by this brood of wrens? 



2. During an outbreak of locusts in Nebraska in 1874, a man 



