STUDIES ON MAGNETIC DISTRIBUTION 



101 



TABLE II. 

 BAR -39 INCH DIAMETER. AT 1 INCH FROM HELIX. 



quantity; but it has been shown by Dr. Stoletow and myself, independ- 

 ently of each other, that JJL increases as the magnetism of the bar in- 

 creases when the latter is not great. Hence between and 8 inches 

 the resistance of the bar, R, is greater than at succeeding points, and 

 hence a less number of lines of induction pass down the bar from 8 

 towards than would be given by the formula, which has been adapted 

 to the average value of E at from 9 to 14 inches. In Table II this 

 same fact shows itself towards the end of the Table, and would prob- 

 ably be more prominent had the Table been carried further. However, 

 in this Table all things have combined to satisfy the formula with great 

 accuracy. 



In Table III we come across a fact of an entirely different nature 

 from the above. Fig. 2 is the plot of this Table, and gives the values 

 of Q' ( at different parts of the rod. 



