34 



Mr. J. H. Pointing on a method, $c. [Nov. 21, 



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



Weight in 

 pan. 



Extremities of 

 oscillations. 



Besting point. 



Mean of pre- 

 ceding and 

 succeeding 



resting points. 



Differences. 



A + Y, 



245-3 



238 -7 

 244'2 



241 -72 



In one observation not re- 

 corded just before this the 

 clamp had been loose, and 

 the scale pan had slipped, 

 and the resting point was 

 thereby changed. The dis- 

 turbance had apparently 

 not subsided when this was 

 taken, it is therefore re- 

 jected. 



B + X 



193-0 



185-7 

 191-4 



188 -91 



A + Y 



226-6 



243 -3 

 229-2 



235 -60 



188 -22 



47-38 



B + X 



A + Y 



182-2 



192-8 

 182 -4 



229-4 



239 -2 

 231-6 



187-55 



234 -85 



235-22 



187 -47 



47-67 



47-38 



B + X 



194 -4 



182-5 

 192-2 



187-4 



234-71 



47-31 



A + Y 



239-8 



229-7 

 239-1 



234-57 



187 -50 



47-07 



B + X 



194-7 

 181 

 192 -5 



187-60 



234-51 



46 -91 



A + Y 



B + X 



230-6 



237 -4 

 232-4 



186 -0 



189-0 

 185-6 



234 -45 



187 -40 



187-50 



46-95 



Mean (B+X) — (A + Y) =47 '24 divisions =0-4119 milligramme. 

 Greatest deviation from the mean = - 43 division ='00375 mgm. 



