109 



(2) Engelmann, T. W. : Arch. f. ges. Physiol., 1871, iv., p. 



44, cited aft-er Biedermann,W., "Electropliysiolos^y,'' 

 translated by Welby, F. A., London, 1896, vol. i., 

 p. 164. 



(3) Robertson, T. Brailsford : Trans. Roy. Soc. S. Austr., 



1905, xxix., p. 1. 



(4) Hewitt, C. G.: "The House Fly," Cambridge Univ. 



Press, 1914. 



(5) Bancroft, F. W. : Journ. Physiol., 1906, xxxiv., p. 444. 



(6) Meltzer, S. J., and Auer, J.: Amer. Journ. Physiol., 



1906, xvii., p. 313. 



(7) Alvarez, W. C. : Amer. Journ. Physiol., 1914, xxxv., 



p. 117; 1918, xlv., p. 342; xlvi., p. 554. 



(8) Alvarez, W. C, and Starkweather, E. : Amer. Journ. 



Physiol., 1918, xlvi., pp. 186 and 563. 



(9) Taylor, F. B., and Alvarez, W. C. : Amer. Journ. 



Physiol., 1917, xliv., p. 344. 



(10) de Tarchanoff, J. : Ricliet's Dictionaire de Physiol., 1900, 



iv., p. 616. 



(11) Straub, W. : Arch. f. d. ges. Physiol., 1900, Ixxix., 



p. 379. 



(12) Bayliss, W. M., and Starling, E. H. : Journ. Physiol., 



1899, xxiv., p. 99. 



(13) Schafer, E. S., and Moore, B. : Journ. Physiol., 1896, 



XX., p. 1. 



(14) Gunn, J. A., and Underbill, S. W. F. : Quart. Journ. 



Exper. Physiol., 1914, viii., p. 275. 



(15) Abel, J. J. : Ber. deutsch. chem. Ges., 1903, xxxvi., 



p. 1839. 



