io6 ON THE ACCURACY ATTAINABLE WITH 



RESULTS 



The following are eight different values of g obtained by 

 the method indicated above. The experiments are grouped in 

 pairs, at the beginning and end of which a' was determined 

 a few times, the mean of each set being taken as holding for 

 the actual experiments. 



VALUES OF g DETERMINED WITH MODIFIED FORM OF 

 ATWOOD'S MACHINE 



DISCUSSION OF RESULTS 



Considering the magnitude of the frictional correction for 

 the particular apparatus used in these experiments and the 

 slight uncertainty in its numerical value, the remarkably 

 good mean value obtained for g must be regarded as somewhat 



