38o ANIMAL AGGREGATIONS 



Forbes, S. A. 1887. The lake as a microcosm. Bull. Peoria Acad. Sci. 1887. 



17 pp. Reprinted in III. State Nat. Hist. Survey Bull. 15:537-50. 

 Ford, H. A. 1852. On the characteristics of Troglodytes gorilla. Proc. Acad. 



Nat. Sci. Phila. 6:30-33. 

 Ford, H.J. 1915. The Natural History of the State. Princeton University Press. 



188 pp. 

 FoREL, A. 1921-23. Le monde social dcs fourmis. 6 vols. Geneve: Librairie 



Kundig. 

 . 1929. The Social World of the Ants Compared with That of Man. Trans- 

 lated by C. K. Ogden. 2 vols. New York: Albert and Charles Boni. 

 Fowler, J. R. 1927. Concerning group protection in aquatic animals. Mas- 

 ter's thesis. University of Chicago Library. 

 . 1931. The relation of numbers of animals to survival in toxic concen- 

 trations of electrolytes. Physiol. Zool. 4. 

 Fox, K. MuNRO. 1923. Lunar periodicity in reproduction. Proc. Roy. Soc. 



London B. 95:523-51. 

 Fraenkel, G. 1929. Untersuchungen iiber Lebensgewohnheiten, Sinnesphy- 



siologie und Sozialpsychologie der wandernden Larven der afrikanischen 



Wanderheuschrecke. Biol. Zentralbl. 49:657-80. 

 Frank, G., and M. Kurepina. 1930. Die gegenseitige Beeinflussung der Seei- 



geleier als mitogenetischer Effekt betrachtet. Arch. f. Entw. d. Org. 121: 



634-38. 

 Frazer, J. G. 1910. Totemism and Exogamy. Vol. IV. New York: Mac- 



millan. 379 pp. 

 Friedmann, Herbert. 1929. The Cow Birds: A Study in Social Parasitism. 



Springfield, 111.: C. C. Thomas. 421 pp. 

 Frisch, K. VON. 1918. Beitrag zur Kenntnis sozialer Instinkte bei solitaren 



Bienen. Biol. Zentralbl. 38:183-88. 

 Frison, T. H. 1927. The development of castes of bumblebees (Bremidae). 



Ann. Ent. Soc. Amer. 20:156-81. 

 FucHS, H. M. 1914. Action of egg secretions on fertilizing power of sperm. 



Arch, fur Entw. Mech. 40:205-53. 

 . 1915. Studies in the physiology of fertilization. Jour. Genetics 4:215- 



301. 

 Fulmer, E. I. 1921. The acclimatization of yeast to ammonium fluoride and 



its inversion in wort. Jour. Phys. Chem. 25:455-72. 

 Fulmer, E. L, and V. E. Nelson. 1922. Water soluble B and "bios" in yeast 



growth. Jour. Biol. Chem. 51:77-82. 

 Fulton, B. B. 1925. Physiological variation in the snowy tree cricket. Ann. 



Ent. Soc. Amer. 18:363-83. 

 . 1928. A demonstration of the location of auditory organs in certain 



Orthoptera. Ibid. 21:445-48. 



