Bibliography. 105 



112. Tschudi, Frederic de. Destructive Inserts and the Immense 



Utility of Birds. 



Journ. R. Agric. Soc., 1862, vol. 23, pp. 231-246. 



113. Warburton, C. The Wild Birds' Protection Act of 1894. 



Journ. R. Agric. Soc., 1895, vol. 6. pp. 365-369. 



114. Wenninger, F. J. The Economic Value of Birds. 



Notre Dame, Ind., Amer. Midi. Nat., 1909, pp. 

 105-109. 



Many useful notes and articles are to be found in the Farmers' 

 Bulletins and Annual Reports and Yearbooks of the U.S. Depart- 

 ment of Agriculture, the "Field," "Country Life," and the "Auk." 



