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EXPERIMENTAL PHARMACOLOGY 



Fig. 76. Jaquet chronograph (records in intervals of 1/5 second and 1 second). 



V 



Fig. 77. Two forms of time clocks. (Both made by E. Zimmermann, Leipzig and 

 Berlin.) The large clock (Bowditch-Baltzar) marks intervals of 1, 2, 3, 4, 5, 10, 15, 

 JO, 30 and 60 seconds. 



