Observatio7is with Katers Penduhuns. 



173 



Table III. 



General Walker states in his paper above cited that the Green- 

 wich and Kew swings were reduced to a vacuum by using the 

 Kew formula, 



Correction = 0-32 -4 ^ 



1 + -0023(t-32) 



Hence in order to make them comparable with the Melbourne 

 swings, they must be increased by the quantity 



(0-34-0-32) -^I- — _ = +0-505. 



\ /• 1 + -0023 X 30 



They must also be reduced to sea-level by applying the corrections 



0-061 for Kew. 



^ — ^= -1- 0-646 for Greenwich and -— 



140 



For Sydney the reduction to sea-level is ^^y^ = -f 0-576 



Reduction to a vacuum 0.34.- 



26 



8-269 



1-f- 0-0023x30 



The whole correction to be applied to the numbei-.s in Table 

 III. is therefore : 



To Greenwich numbers -f 1-15 

 „ Kew „ + 0-57 



„ Sydney „ + 8.85 



