80 



EXPERIMENTAL PHARMACOLOGY 



Fig. 73. Metronome for operating the electric time signal. 



Fig. 74. Lieb-Becker time marker made from an Ingersoll watch. Time intervals 



of 1 second, 5 seconds or 1 minute may be recorded. Obtainable from Mr. J. Becker, 



Terrace Avenue, Maywood, N. J. Price $5.50. (See C. C. Lieb: Jour, of Pharm. and 

 Therapeutics, 1917, 9, 227.) 



