ON SEISMOLOGICAL INVESTIGATION. 



173 



Society,' vols, i.-xx. Seventeen Reports on Seismic Phenomena drawn up 

 by the writer for the British Association, 1881-1896. 



With the exception of groups of observations made within a few 

 hundreds of kilometres of an epifocal area, all records which refer to 

 maxima phases of motion, as, for example, those which appareiitly disturb 

 magnetographs, have been neglected, and therefore, taken as a whole, the 

 velocities given in the following list are based upon the times at which 

 preliminary tremors have commenced to show themselves at various 

 stations. 



