THE PRACTICAL VALUE OF BIRDS. 47 



Palmer, T. S. Legislation for the Protection of Birds Other Than Game 

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Hunting Licenses, Their History, Objects and Limitations. U. S. Biol. 



Surv., Bull. No. 19, 1904. 



Some Benefits the Farmer May Derive From Game Protection. U. S. 



Department Agile., Yearbook for 1904, pp. 509-520, 1905. 



Game Protection in 1904. U. S. Dept. .Agric., Yearbook for 1904, pp. 



606-610, 1905. 



Statistics of Hunting Licenses. U. S. Biol. Surv., Circular No. 54, 1906. 



Private Game Preserves and Their Future in the United States. U. S. 

 Biol. Surv., Circular No. 72, 1910. 



Chronology and Index of the. More Important Events in American 



Game Protection, 1776-1911. U. S. Biol. Surv., Bull. No. 41, 1912. 



Pearson, T. G. National Audubon Society, Educational Leaflets: No. 41. 

 The Mockingbird. No. 46. The Robin. No. 49. The Chimney Swift. 

 No. 54. The White Egrets. 



Pennock, Charles J. Some of Our Useful Birds. Dela. State Board Agric., 

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Piper, Stanley E. The Nevada Mouse Plague of 1907-8. U. S. Dept. Agric., 

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Mouse Plagues, Their Control and Prevention. U. S. Dept. Agric., Year- 

 book for 1908, pp. 301-310, 1909. 



Ridgway, Robert. A Manual of North American Birds. 



The Birds of North and Middle America. U. S. Nat' 1 Museum, Bull. No 



50. Five volumes issued, others to follow. 



Riley, C. V. Insectivorous Habits of the English Sparrow (Passer domes- 

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 111-146, 1899. 



Roberts, Thomas S. National Audubon Society, Educational Leaflet : No. 

 57. The Yellow-headed Blackbird. 



Sclater, W. L. A History of the Birds of Colorado. 576 pages. London. 

 1912. 



Sherman, Althea R. At the Sign of the Northern Flicker. The Wilson Bul- 

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Stone, Witmer. National Audubon Society, Educational Leaflets: No. 42. 

 The Orchard Oriole. No. 50. The Carolina Wren. 



Sullivan, Richard H. The Economic Value of Bird Life. Kas. State Agric. 

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Thayer, Abbot H: National Audubon Society. Special Leaflet No. 6, The 

 Bartramian Sandpiper. 



Treadwell, D. The Food of Young Robins. Proc. Boston Soc. Nat. Hist., 

 Vol. VI, pp. 396-399, 1859. 



Walter, Alice H. National Audubon Society, Educational Leaflet: No. 55. 

 The Hairy and Downy Woodpeckers. 



