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MESSES. G. F. C. SEAELE AKD T. G. BEDFOED 
47 centinis., and thus since the internal radius of the windings was about 2 centims. 
the applied magnetic force was far from uniform near the ends of the wires. The 
results of this experiment are shown in figs. 19, 20. As we pointed out in § 18, 
li exhibits hysteresis with respect to both B and H. In fig. 19 the straight line 
through the origin I'epresents 2BA/47r/~, the demagnetising force corresponding to 
uniform magnetisation, H in these experiments being negligible in comparison with B. 
From the areas of the curves we found 
J'HdB = 89200, |/;dB = 949, 
J/u/H = 1-57. 
