CATENATION, &c. SECT. XVII. "3. 7, 



one experiences in fome degree when he hears a noife in the 

 dark, which he cannot inftantly account for. This catenation 

 of ,fear with ;urprife is owing to our perpetual experience of in- 

 juries from external bodies in motion, unlefs we are upon our 

 guard againft them. See Seel:. XVIII. 17. XIX. 2. 



Many other examples of the catenations of animal motions 

 are explained in Seel. XXXVI. on the Periods of Difeafes* 



SECT 



