i:\KTIIul 'AKi: MOTION TO OREAT DISTANCES. 



157 



Turning to the second phase, we see the same features repeated, and as the time 

 intervals are longer, and consequently the effect of a small error less, there is a still 

 more marked steadiness in the increase of apparent velocity with distance, as is shown 

 in the following tabular statements : 



Second Phase ; heavy pendula. 



Second Phase ; light pendula. 



Turning to the third phase and taking first the times at which the slow movement 

 was recognised as commencing, we get a much leas closely concordant series of times 

 than in the case of the first or second phase. The interval being also longer, these 

 divergences have but a small influence on the deduced rate of travel, nor do the 

 extreme values depart much from the average value, except in the case of those 

 records which have been rejected as too much in advance of the others to allow of 

 their reference to the same phase. 



The average of the observations works out as follows : 



