Lifting Power of the Electro-Magnet. 



303 



Table my results, subjoining an explanation of each of its columns, and any 

 miscellaneous facts which could not be easily tabulated. 



Table. 



The second column of this Table contains the number of experiments on 

 which the value of 1/ given in the fifth is based. In general, two sets of five 

 each were taken on separate days, and if they were in close agreement this was 



