162 SOME REACTIONS AMONG ANIMALS 



McGuire, W., " The Hookworm and the South." Pearson's Magazine, 

 September, 1909. 



Carter, Marion H., "The Vampire of the South." McClure's Maga- 

 zine^ October, 1909. (Hookworm.) 



"The Coming War on the Hookworm." Current Literature, Decem- 

 ber, 1909. 



Herrick, General Zoology, Chap. VIII. 



Jordan and Kellogg, Animal Life. Chaps. X-XI. 



Thompson, J. Arthur, The Study of Animal Life. Chap. IV-V. 



Davenport, C. B., Introduction to Zoology, pp. 151-158. 



Osborn, Herbert, Economic Zoology. Chaps. IV-V. 



Van Beneden, Animal Parasites and Messmates. 



Stiles, C. W., " Hygienic Laboratory." Bulletin No. 10, 1903, Depart- 

 ment of Agriculture. 



Smith, " Uncinariasis (Hookworm) in Texas." American Journal of 

 Medical Science, 1903- 



Kinyoun, "Uncinariasis in Florida." Report of American Health 

 Association," 1907. 



Soil Pollution and the Hookworm in the South. Alabama Board of 

 Health. 



"Medical Influence of the Negro in Connection with Anaemia in the 

 White," Bulletin North Carolina Board of Health, June, 1908. 



The Significance of Recent American Cases of Hookworm Disease in 

 the South. 1902. 



McGuire, W., " What Bill 18,792 meant to the South." (Hookworm.) 

 Pearson's Magazine, September, 1909. 



PROBLEM XXIX (Optional) 1 



A study of the idea of adaptations as shown in the 

 crayfish. 



Materials. Living and preserved crayfish, deep trays of fresh water, 

 pipettes, hand lens, vial of carmine solution or red ink, raw meat or 

 beef juice, ammonia. 



a. Protection 



Method. Place a live crayfish in a tray of water. 

 Observations. 1. What is the general color of the crayfish ? 

 2. Is it the same in all parts ? 



1 This may well be the third problem taken if one desires to follow exactly 

 the latest New York State Syllabus for Elementary Biology. 



