40 
Paige, C. L. 
08. A method of cultivating rainbow trout and other salmonids. 
Bull. U. S. Bur. Fisheries, 28 (Pt. 2) : 781~787. 
Petersen, C. G. J., and Jensen, P. B. 
‘11. Valuation of the sea. I. Animal life of the sea-bottom, its food 
and quantity. Rep. Danish Biol. Station, 20 : 1-76. 
Phelps, E. B. 
09. The pollution of streams by sulphite pulp waste: a study of 
possible remedies. U.S. Geol. Surv., Water-Supply Paper 226. 
Porter, J. E. 
"17. The activated sludge process of sewage treatment: a bibliog- 
raphy of the subject. Printed by the General Filtration Co., Inc., 
Rochester, N. Y. 
Powers, E. B. 
14. The reaction of crayfishes to gradients of dissolved carbon 
dioxide and acetic and hydrochloric acids. Biol. Bull., 27 : 177— 
200. : 
18. The goldfish (Carassius carassius L.) as a test animal in the 
study of toxicity. Ill. Biol. Mon., 4 : No. 2. 
Ransom, W. H. 
66. On the conditions of the protoplasmic movements in the eggs 
of osseous fishes. Jour. Anat. and Physiol., 1 : 237-245. 
Richardson, R. E. , 
13. Observations on the breeding of the European carp in the 
vicinity of Havana, Illinois. Bull. Ill. State Lab. Nat. Hist., 9 : 
387-404. 
‘13a. Observations on the breeding habits of fishes at Havana, Illi- 
nois, 1910 and 1911. Bull. Ill. State Lab. Nat. Hist., 9 : 409. 
Shelford, V. E. 
10. Ecological succession of fish and its bearing on fish culture. 
Trans. Ill. Acad. Sci., 3 : 108-110. 
11. Ecological succession. I. Stream fishes and the method of 
physiographic analysis. Biol. Bull., 21 : 9-35. 
11a. Ecological Succession. II. Pond fishes. Biol. Bull., 21 :127— 
151. 
’11b. Ecological succession. III. A Reconnaissance of its causes in 
ponds with particular reference to fish. Biol. Bull., 22 : 1-38. 
14. Suggestions as to indices of the suitability of bodies of water 
for fishes. Trans. Am. Fisheries Soc., 44 : 27-82. 
"16. Physiological characters of marine animals from different 
depths. Trans. Am. Fisheries Soc., 45 : 191-197. 
‘16a. Physiological differences between marine animals from differ- 
ent depths. Puget Sound Marine Station Pub., 1 : 157-174. 
