THE METABOIJC MACHINERY OF ANIMALS 325 



Metcalf, C. L., and Flint, W. P., Fundamentals of Insect Life, McGraw-Hill 



Book Co., 1932. Chs. Ill and IV. 



A brief account of insect anatomy and physiology. 

 Pearse, A. S., and Hall, E. G., Homoiothermism, John Wiley & Sons, Inc., 



1928. 



An interesting discussion of the origin of warm-blooded vertebrates. 

 Plunkett, C. R., Outlines of Modern Biology, Henry Holt & Co., 1930. Ch. V. 



A good physico-chemical account. 

 Rogers, C. G., Textbook of Comparative Physiology, McGraw-Hill Book Co., 



1927. Chs. XVI, XVII, XXII. XXIII, and XXVII 



An advanced account of physiological digestive processes from a com- 

 parative viewpoint. 

 Wells, H. G., Huxley, J. S., and Wells, C. P., The Science of Life, Doubleday, 



Doran & Co., 1934. Ch. II, Sec. 7, Book 1 ; Ch. II, Sees. 4, 5, and 6. 



A readable, popular account. 



