APPENDIX IV. 327 



1854. Wolford, H. L. On the Importation and Protection of 

 Useful Birds. United States Patent Office, Agricultural 

 Eeport, Part II., 1853, pages 71-74. 



A strong recommendation for the importation of immense 

 .numbers of European song and insectivorous birds into 

 America. 



1855. Le Baron, William. Observations upon some of the 

 Birds of Illinois most interesting to the Agriculturist. 

 Transactions Illinois Agricultural Society, 1853-54, vol. 

 i., pages 559-565. 



A general discussion, with especial reference to the insectivo- 

 rous birds of Illinois. 



1859. Jenks, J. W. P. The Food of the Robin. Transactions 

 Massachusetts Horticultural Society, 1859. 



Critical study of stomach contents of many specimens. 



1859. Treadwell, D. The Food of Young Robins. Proceed- 

 ings Boston Society of Natural History, vol. vi., pages 

 396-399. 



Amount of food eaten by young robins. 



1859. Kirkpatrick, John. Rapacious Birds of Ohio. Ohio 

 Agricultural Report for 1858, pages 341-383. 



1860. Kirkpatrick, John. Birds of Ohio. Ohio Farmer 

 (Cleveland), 1858-1860. 



A series of articles running through three years. 



1861. Collins, W. 0. Report of Senate Select Committee upon 

 Senate Bill No. 12, " For the Protection of Birds and 

 Game." Fifteenth Annual Report Ohio State Board of 

 Agriculture for 1860 (1861), pages 381-390. 



Facts in the natural history of Ohio birds, with recommenda- 

 tions for legislative action. 



1861. (Harris, S. D., Editor.) Field Notes, I., 1861, page 65. 



Note on the introduction of the English skylark at Columbus, 

 in 1851. 



