Captain Kater's account of the 



The sixTroy Pounds, 

 DiTisioas. 



Ui 



0,0 



— 1,0 



— 2,2 



The 6 lb. weight, 

 No. 3. Divisions. 



•2,0 

 ■4.8 



3'6 



Difference 

 Divisions. 



2,0 

 3.8 

 1,6 



1.4 



} 



Mean. 



2,2 



Difference 

 in grains. 



— 0,31 



Added two-tenths of a grain to the 61b. weight No. 2. 



+ 1.5 

 + 1,2 



+ 1.7 

 -3.8 

 -3.8 



— 4.8 



— 0,2 

 _-5?2*4 



— 2,3 



— 1,9 



— 3.3 



~o,5 



— 1.5 

 + 1,2 

 -1,8 



— 7.0 



— 4,6 



— 4'8 

 -3,6 

 -3.6 



— 4>6 

 -4.3 



— 2,0 



— 2,7 



— 0,5 

 + 20 



— 3.2 

 + 0,2 



— 4,6 



— i»% 



— I, 



-'2,7 



— 1,0 



— ».54 



— 0,22 



Added 0,17 of a grain. 



The 6 lb. weight No. 1. 

 The mean of four comparisons gave for the difference of 

 No. 1. from the six troy pounds, — ,29 + ,3 = +,01 

 The mean of six other comparisons - - +,02 



The 6 lb. weight No. 2. 

 The mean of four comparisons gave for the difference of 



No. 2. from the six troy pounds --,31 + ,2 -f->i7= +,0^ 

 The mean of 1 1 other comparisons gave — ,22 +,17 = —,05 



The final means of these results obtained in the same 

 manner as those of the troy pounds are as follows : 



Grains. 



The difference of No. 1, from the six troy pounds is +,016 

 of No. 2, _ _ _ - — ,020 



The mean difference is — ,002 



