302 Dr. C. Fromme on the Magnetism of Steel Bars. 



an initial magnetism U, as soon as we count this to the resi- 

 dual magnetism. These experiments are represented in 

 Table V. 



Table V. 



Ellip- 

 soid. 



u. 



U+R, 



R 1 

 R * 



Ellip- 

 soid. 



U. 



U+R K 

 U+K 



R* 



U+R 



I. 1. 



14100 



0-955 



0-942 



II. 1. 



31730 

 142200 



0893 

 0-936 



0-865 

 0-828 



2. 



,18530 



0941 



0-916 













126300 



0-945 



0-859 



2. 



158750 



0-931 



0-928 





195400 



0940 



0-839 





313300 



0-938 



0933 



3. 



51540 



1508.10 



0930 

 0-947 



0-901 



0-895 





431400 



0-934 



0-795 





293600 



0-932 



0868 



3. 



276650 



0958 



— 





589800 



0-932 



0-795 





397600 

 448100 



0-973 

 0931 



0-822 



4. 



28/200 



0-968 



0-930 





698600 



928 



0-783 



5. 



1049200 

 1754700 



0929 

 0-918 



0-827 

 0-789 





990400 



0917 



0-732 





2802000 



0-906 



0670 



4. 



706000 



897400 



1039000 



1 519000 



0955 

 0962 

 0-958 

 0-922 



0-833 

 0-826 

 0-811 

 0-785 





Mean 



U+Kj U+R, 







U+R 1 U+R 





2 317000 

 2 865400 



0-942 

 0-912 



0-733 

 0-648 



; 



[. 1. 0-955 



? II. 1. 0-910 













2. 0-942 



2. 0-934 



5. 



962300 



951 



0-830 





3. 0935 



3. 0-941 





1287000 



0965 



824 





4. 0-968 



? 4. 942 





1807800 



0-928 



0-762 





5. 0-918 

 0-944 



■ 



r 



>. 0-928 





2497400 

 4205000 



0-896 

 0902 



0-757 

 0-592 



0-931 



Although this Table has no pretension to completeness, since 

 -with several of the ellipsoids there are too few experiments, 

 and the dimensions and hardness of the bars are too little va- 



TT , T) 



ried, yet this much is evident, that *i — vr 1 may pass for tole- 



rably constant ; while it is indubitably shown that yr 1 diminishes 

 when the magnetizing force (or what is here considered the same 

 thing, U) 



increases. 



Moreover this diminution of ^ with hi- 

 lt, 



creasing U is self-evident from the found constancy of ^ — =— ^ 

 to J U + R 



Therefore to the progressive rotation of the molecular magnets 



into positio?is of magnetic equilibrium is opposed an increasing 



resistance. 



