CONTRACTILE TISSUES 463 



permeability, on excitation by various means. These changes of form are, in 

 many cases, afterwards fixed by differences in rate of growth. 



A short account is given in the text of the graphic method, as used in 

 physiological work, together with some practical details. 



LITERATURE 



General. 



Von Frey (1909). Griitzner (1904). 



Forms of Contraction. 

 Fick (1882). 



The Contractile Process. 



Fletcher and Hopkins (1907). A. V. Hill (1911, 1, 1912, 2 and 3, 1913, 1, 2 and 4). 



Heat Production in Muscle. 

 A. V. Hill (1913, 4). 



Action of Ions. 



Mines (1913, 1 and 3). 



Efficiency and Respiratory Exchange in Work. 



A. V. Hill (1913, 2). Benedict and Cathcart (1913). 



Regulation of Temperature. 



C. J. Martin (1901). Barbour (1912). 



Graphic Method. 



Frank (1911). Garten (1911). 



