68 



REPORTS ON THE STATE OF SCIENCE. 



Fig. 2. 

 Curves of Amplitude from Mibtc Il.P. 



1 2 3 4 5 6 7 d 9 10 II 12 13 14 15 16 17 160° 

 Decrees en tens. 



Curves for earthquakes I., II., III., and V. eIiow that up to a certain 

 distance from an origin, amplitude is inversely proportional to distance. 

 After this the curves for amplitude rapidly become less steep and 



