14 



Captain Kater's account of the 



The following quantities were added to the different 

 weights : 



To No. 3. 

 4. 

 5. 



iQ05 grains. 



,002 



,00a 



Mr. Robinson exchanged the balance I had hitherto used 

 for another, which he thought superior. The mean of many 

 trials gave 0,7 of a division for the variation occasioned by 

 one-hundredth of a grain. 



