TIME OF EARTHQUAKE : RATE OF PROPAGATION. 297 



This conclusion is further borne out by consideration of the intervals Dehra 

 Dun — Toungoo by the two methods of measurement. 



Dehra Dun — Toungoo. 



M. s. 



(1) By direct measurement of time of shock . . 8-17) Mean 



8-8 \ 8-18 

 8-28 ) 



(2) By measurement frQm disturbances (which elimi- 9-37^1 



nates error of clock). 



9-10 I Mean 

 9-32 f 9-27 

 9-23 

 9-38 ! 

 9-25 j 



or Toungoo time slow 1m. 9s. and mean correction to Toungoo = +1m. 8s. 



y t — Comparisons of the intervals of time found from Dehra Dun to the other obser- 

 vatories. 

 Dehra Dun— Barrackpur — 



m. s. 

 (a) Direct measurement . . . . . 4-48 \ Mean 



5-0 5-0 ^ 

 512 ) 



r5-5 



By measurement from disturbances . . 4-58 



5-13 

 5-14 

 5-3 

 4-59 

 5-3 J 

 Dehra Dun — Kodaikanal — 



(a) By direct measurement .... 10-7 ") Mean 



10-29 [ 10-21 

 10-27 ) 



J- 5-3 



] 



(6.) By measurement from disturbances . . 10-281 L 10-1 7 



10-11 I [ 



ft? Mo- 12 J 



10-15 

 10-4 J 



This shows that the clock times at Dehra Dun, Barrackpur and Kodaikanal are 

 correct. 



VI. — Final values of lime of principal shock. 



For the reasons shown Ijy the tables in V there is no good reason for not 

 accepting the times given for Dehra Dun, Kodaikanal and Barrackpur, the only 

 correction is then to add Im. 8s. to the Toungoo time. 



The times then become — H. M. s. 



Dehra Dun 6-11-38' 



Barrackpur ..... 



Kodaikanal ..... 



Toungoo .. . . . 



6-11-38^ 



6-16-41 Uladra 

 6-22-0 \ time. 

 6-21-3 J 



