SEISMOGRAPH RECORDS 



381 



* Computed by Dr. R. D. Oldham from seismograph records as Oh. 20m. 30s. 



a Oh. 31m. 52s. 



b First maximum, Ih. 3.0m. 



Second maximum, Ih. 7.3m. 

 c Or 23h. 49.1m. 



d Or 2h. 0.9m., or 2h. 12.0m. times. Recorded roughly on account of failure 

 of occultation watch. 



e Given as 20h. 40.8, September 4, probably error for Oh. 40.8m. 



f Boom caught at maximum by eclipse plate of watch. 



g Beginning and end lost in air tremors. 



h Amplitude of principal portion given elsewhere as 15.2 millimeters. 



Early SJiock of September 10, 1899 



P ace of observations. 



Commence- 

 ment of 



preliminary 

 tremors. 



Maximum. 



Amplitude in 

 millimeters or 

 seconds of arc. 



Total 

 duration. 



Yakutat (Disenchantment) 

 Bay, Alaska. 



Cape Whitshed, Alaska 



Victoria,- British Columbia . . 



h, m. s. 



17 01. 30 * 



(a) 



Lost in 

 mails. 

 17 11 56 

 17 15.3 



h. m. s. 





h. m . 











Vibrations 

 across paper. 





Toronto, Canada 



17 25 19 

 17- 50.1'' 



17 48.0 





Kew England 



2.18 inches ex- 

 ceeded. 



1 39 



Shide, England 



2 12.2 



San Fernando, Spain 



Bombav (Colaba), India, . . 



17 9.1) 



17 47.1 



17 58 47 



18{ ^-^c 

 ^^i 12.5 



18 8.2 

 18 10.8 



2.58 inches. . 

 0.78 inch.... 



1-21 







^Madras, India 



17 28.3 



17 30.2 

 17 .32 8 



17 36.2 





Batavia, Java 



07 J 



2.0 inches. . . 

 2.0 mm 



0.5inch 



1 16 



Cordoba. Argentina 



Cape Town, South Africa. . . 



2 12 

 2 



a The time of origin given above for Disenchantment Bay was computed by 

 Dr. R. D. Oldham from seismograph records, 

 b First maximum, 17h. 50.1m. 



Second maximum, 17h. 53.5m. 

 c Clock stopped at 18h. 36m. 



