48 REPORTS ON THE STATE OF SCIENCE. — 1916. 



Table XIII. 

 (b) The following stations apparently record PR, as P : 



The tables require no correction at the mid-points of these arcs, 

 so that O — C2 is the same as 0— Ci. 



(c) All the remaining stations at distances exceeding 108° record 

 PX, as follows, taking the tabular results from Table X. : — 



Table XIV. 



We may now assemble the results in a brief summary, including 

 those for intermediate stations ; individual details are omitted to save 

 space, and it need only be remarked that three records (Simla, Apia, 

 and Hohenheim) have been omitted as discordant, and that all the 

 others have been given equal weight. This summary procedure is 

 doubtless faulty, but it will suffice for present requirements. 



Table XV. 

 1913 March U^ &" U"" (54^). 3° 5 N. 125°-5 E. (Szirtes). 

 Becords of P, PE, and PX. 



The first three groups are in good accord, showing that the distance 

 of the epicentre from European stations is pretty well determined. The 

 azimuth is checked by the individual stations in the first group, already 

 given in detail; and these records support the new tables. The 



