Lutitiulc \uiiiber oi' vibrations per day of a 



Londuii seconds peiidnluin 

 OliscTved Compiiteil 



Dunin Island 27'-' 4' 12" N S6322.0ß 86310.81 

 From these we lia\e calculated 



Olisei-vod Comi.utitl 



// at P.onin Island 979.3SS 979.132 



Computed from Professor Everett's formula // comes out to be 979.139. Thus 

 it will be seen that the observed value is greater than the computed, contrary to 

 what we might e.xpect in view of the isolated position of the islands, rising as 

 they do out of the deep basin of the Pacific Ocean. 



In the case of the Tokio and Sapporo results, a.s any error in the Tokio 

 value would affect the Sapporo value with a similar error, the coincident e.Kcess 

 of f) as ob.served over the calculated value might have been predicted. But 

 now combining the results of the Bonin, Tokio and Sapporo experiments, we 

 venture to say that the acceleration due to gravity is prob;d)ly slightly greater 

 in the neighborhood of Japan than at other places in the same latitude. Further 

 determinations will however be necessary before a definite decision can be come 

 to on this point. 



