286 Warder and Shipley— Floating Magnets. 
Under the new method of experiment, on the other hand, if 
the magnets may be regarded as indefinitely short, Professor 
I. Sharpless has shown us tha 
rt 
, 
— (2) 
in which F, is the sepalgion towards sie center, 
sa constant depending upon the current strength and 
go number of woke in the coil, and 
R = radius of the co 
As may readily be co ay a variety of cena ope with 
a given number of magnets results from the forces 
which may be varied at will by combining shies Bio unlike 
functions. on is clearly seen in the ee figures, 
AG 
OO 
© 
configuration No. 9 was obtained by the combined repulsion 
of the central magnet and the current. 
