CONTRIBUTIONS FROM THE DIVISION OF ANIMAL BREEDING AND PATHOLOGY 
Series Beginning 1909. 
1. Cole, Leon J.—The orow a menace to poultry raising. R. I. Agr. Expt. Sta. Rpt., 1909, 
pp. 312-310. Reprinted, 1909. 
2. Miller, Arthur C.—Mating experiments with bees. R. 1. Agr. Expt. Sta. Rpt., 1909, 
pp. 306-311. Reprinted, 1909. 
3. Cole, Leon J.—Methods of keeping pedigree records in use at the R. I. Agricultural Experi¬ 
ment Station. R. I. Agr. Expt. Sta. Rpt., 1909, pp. 317-324. Reprinted, 1909. 
4 . Hadley, Philip B. — Studies in avian cocoidiosis: I. White diarrhea in chicks; II. Roup in 
fowls. Centbl. f. Bakt. [eto.], Abt. 1, Orig., 1909, 50 (3), 348-353. 
5. Hadley, Philip B.—Notes on the behavior of the domestio fowl. Amer. Nat., 1909, 43, 
pp. 669-670. 
0. Hadley, Philip B.—Notes on the parasitism of Cylodites nudua and Haemophyaali* chordeilit- 
Science, N. S., 1909, 30, p. 774. 
7. Hadley, Philip B.—Regarding the value of the van Gieson and the Romanowsky malarial 
stains for the detection of ooocidia. Centbl. f. Bakt. [etc.], Abt. 1, Orig., 1909, 52 (1), pp. 
147-150. 
8. Cole, Leon J. and Hadley, Philip B. — Ropy milk in Rhode Island. R. I. Agr. Expt. Sta. 
Bui., 136, pp. 129-152, June, 1909. 
9. Cole, Leon J., and Hadley, Philip B., with the assistance of Wm. F. Kirkpatrick. —Blaok- 
head in turkeys. R. I. Agr. Expt. Sta. Bui. 141, pp. 137-271, June, 1910. 
10. Hadley, Philip B.—Studies in avian coccidiosis: III. Cocoidiosis in the English sparrow and 
other wild birds. Centbl./. Bakt. Leto.], Abt. 1, Orig., 1909, 56, 522-3. 
11. Hadley, Philip B., assisted by Amison, Elizabeth E. —Further studios on blackhead in 
turkeys. Centbl. f. Bakt. [etc. J, Abt. 1, Orig., 1910, 58, 33-41. 
12. Hadley, Philip B.—Fowl cholera and methods of combatting it. R, I. Agr. Expt. Sta. Bui. 
144, pp. 309-337, November, 1910. 
13. Hadley, Philip B.— Eimeria avium: A morphological study. Archie, f. Protistenk, 1911, 
22, 7-50. 
14. Hadley, Phiup B., and Amison, Elizabeth E. — A biological study of eleven pathogenio 
organisms from cholera-like diseases in poultry. R. I. Agr. Expt. Sta. Bui. 140, pp. 43-102. 
June, 1911. 
18 . Hadley, Philip B. — Studies on fowl cholera; I. A biological study of ten strains of the fowl 
oholera organism. Centbl. f. Bakt. [etc.], Abt. 1, Orig., 1911, 61, 323-335. 
10. Hadley, Philip B.—Studies on fowl cholera-. II. The rdle of an homologous culture of slight 
virulence in the production of active immunity in rabbits. R. I. Agr. Expt. Sta. Bui. 
150, pp. 81-171, March, 1912. 
17. Hadley, Philip B.—Studies on fowl cholera: II. Active immunity in rabbits. Centbl. f. 
Bakt. [etc.], Abt. 1, Orig., 1913, 69, (4), 271-311. 
18. Hadley Philip B.—The presence of the barred plumage-pattern in the White Leghorn 
breed of fowls. American Naturalist, 1913, 47, pp. 418-428; with 6 figures in text. 
19. Hadley, Philip B., with the assistance of Dorothy W. Caldwell and C. H. Magoon. 
—Studies on inheritance in poultry: I. The constitution of the White Leghorn breed. 
R. I. Agr. Expt. Sta. Bui., 155, pp. 151-216, Pis. I-III, June, 1913. 
20. Hadley, Philip B.—Regarding “une nouvelle Coccidie aviaire, Eimeria bracheti (n. sp.).” 
Arch. f. Protistenk, 1913, 31, p. 354-355. 
21. Hadley, Philip B., Ruth Bryant and Marguerite Elkins. —Capsule-formation by the 
bacteria of haemorrhagic septicaemia. Centbl. f. Bakt. [etc.], Abt. 1, Orig., 1914, 72, pp. 478-480. 
22. Hadley Philip B.,—Studies on fowl cholera: III. The inheritance in rabbits of immunity 
to infection with the bacterium of fowl cholera. R. I. Agr. Expt. Sla. Bui. 157,1914, pp. 283 
to 308. 
23. Cole, Leon J.,—Studies on inheritance in pigeons: I. The hereditary relations of the princi¬ 
pal colors. R. I. Agr. Exp. Bui. 158, May, 1914, pp. 311-380, Pis. I-IV. 
24. Hadley, Philip B.,—Studies on fowl cholera: IV. The reciprocal relations of virulent and 
a virulent cultures in active immunzation. R. I. Agr. Exp. Sta. Bui. 159, June, 1914. 
pp.383-403. 
25. Hadley, Philip B.,—Studies on inheritance in poultry: II. The factor for black pigmenta¬ 
tion in the White Leghorn breed. R. I. Agr. Expt. Sta. Bui. 161, December, 1914, pp. 
447-459. 
26. Cole, Leon J., and Kirkpatrick, Wm. F.—Sex ratios in pigeons, together with observations 
on the laying, incubating and hatching of the eggs. R. I. Agr. Expt. Sta. Bui. 162, April, 
1915, pp. 463-512. 
