294 



PROCEEDINGS OF THE AMERICAN ACADEMY 



TABLE I. 



SIMPLE MAGNET. PRELIMINARY EXPERIMENT. 



"Wlien the armature was added, the distribution on the magnet was 

 as in Table II. a. Here, too, the numbers represent only relative 

 values. Table W.h gives, in the first column, the distances ; in the 

 second, the permanent magnetism of the armature (nearly constant 

 after once touching the magnet) ; in the third column, its magnetism 

 when the magnet was attached ; in the fourth, the difference of the 

 second and third ; in the fifth, the value corrected as afterward to be 

 explained. 



TABLE II. 



MAGNET AND ARMATURE. PRELIMINARY EXPERIMENT. 



a. The Magnet. 



