24 Mr. J. H. Poynting on a method of [Nov. 21, 



Determination of (A+X) -(B+Y). 



Weight in 

 pan. 



Extremities of 

 oscillations. 



Besting point. 



Mean of pre- 

 ceding and 

 succeeding 



resting points. 



Differences. 



A + X 



303'3 



294-5 

 301 "8 



298 -52 







B+Y 



303-6 



315-8 

 306 - 2 



310 35 



297 -07 



13-28 



A + X 



288-9 



301*5 

 290 "6 



295 -62 







B + Y 



300-2 



311-6 

 302 *5 



306-47 



This is evidently due to some 

 irregular and short disturb- 

 ing cause, and is rejected. 



A + X 



288 -8 



304-1 

 291 "1 



297 '07 







B + Y 



301-5 



319 -3 

 303 "9 



311-0 



297 -16 



13 -84 



A + X 



291-7 



302 -0 

 293 -2 



297 -25 



310 33 



13-08 



B + Y 



301-0 



316-8 

 304 -1 



309 -67 







Mean (A + X) -(B+Y) = 13-40 divisions. 

 .\ (A + X)-(B + Y)=0-1732 milligramme. 

 Greatest deviation from mean =*44 division ='0057 milligramme. 



