336 APPENDIX IV. 



1873. PERKINS, 0. II. Birds in their Relation to Agriculture. 

 Vermont Agricultural Report, 1872, pages 316-337. 



A paper read before the Vermont State Board of Agriculture, 

 on the economic relations of birds. Abstract in the report of 

 the United States Department of Agriculture, 1873, page 476. 



1874. BAILEY, L. H., JR. Birds. Third Annual Report Secre- 

 tary State Pomological Society of Michigan for 1873, 

 pages 127-128. 



Insect-feeding habits of several common singing birds of 

 Michigan. 



1874. BOYCE, CAROLINE. The Robin. American Naturalist, 

 vol. viii., pages 203-208. 



Habits, food, nesting, broods, time of brooding. 



1874. LANG, J. W. The Value of Insect-Eating Birds. New 

 Hampshire Agricultural Report, 1873, vol. iii., pages 

 297-314. 



Introduction, followed by a synopsis of families with chief 

 characteristics; a discussion on the food of birds, with some 

 apparently new data on stomach contents in a fe\v instances, 

 and concluding remarks on the necessity of a proper balance, 

 the usefulness of birds in general, and a plea for their pro- 

 tection. 



1874. LE BARON, WILLIAM. The Bird Question. Transactions 

 Illinois State Horticultural Society, 1873, vol. vii., pages 

 311-310. 



Discussion of the economic importance of birds. 



1875. PALMER, FRANK H. Insect-Eating Birds, the Farmer's 

 Best Friends. Boston, Massachusetts, Society Prevention 

 of Cruelty to Animals, 1875. 



A prize essay, and an admirable discussion. 



