F. G. HALL. 



3. The amount of water that can be lost by animals without 

 fatal results is in general greater in the less complex animals. 



4. The length of time that animals can endure atmospheres of 

 low relative humidity in general depends primarily upon the kind 

 of integument and secondarily upon the proportion of the body 

 surface to the body mass. 



5. Metabolism of an organism is an important factor in its re- 

 sistance to exsiccation. 



TABLE XII. 



COMPARATIVE RESULTS OF EXSICCATION EXPERIMENTS. 



BIBLIOGRAPHY. 

 Babcock, S. M. 



'12 Metabolic Water: Its Production and Role in Vital Phenomena. Uni- 

 versity of Wisconsin, Agric. Exp. Sta. Research Bull. 22, Madison. 

 Bodine, J. H. 



'21 Factors Influencing the Water Content and the Rate of Metabolism of 



Certain Orthoptera. Jour. Exp. Zool., Vol. 32. 

 Chenoweth, H. 0. 



'17 The Reactions of Certain Moist Forest Mammals to Air .Conditions and 

 Its Bearing on Problems of Mammalian Distribution. BIOL. BULL., 

 Vol. 32. 

 Davenport, C. B. 



'08 Experimental Morphology. New York. 

 Durig, A. 



'01 Was-sergehalt und Organfunction. Pfluger's Arch., 85. 

 Kudo, T. 



'21 Studies on the Effects of Thirst. I. Effects of Thirst on the Weights 

 of the Various Organs and Systems of Adult Albino Rats. Am. Jour, 

 of Anatomy, Vol. 28. 



