468 



EDITOR'S NOTES. 



VARIATIONS IN THE RATE OF THE PENDULUM VIBRATING 

 SECONDS or MEAN SOLAR TIME IN LONDON WHEN TAKEN 

 TO OTHER LATITUDES : 



Latitude. 



Rate. 



Observer. 



Proceeding by well-known methods, we obtain, from 

 the data contained in the preceding table, 86263-60 as 

 the corresponding rate of vibration at the equator, and 

 0051828 as the increase of gravity from the equator to 

 the pole; together with the ellipticity, ^Vl> correspond- 

 ing precisely with the value derived from the thirteen 

 stations of my equatorial and arctic voyages. (Pend. 

 Expts., 1825, p. 334.) 



The following table exhibits the vibrations at the 



