'2 ( JS Dr. C. Fromme on the Magnetism of Steel Bars. 



Table IV. (continued.) 



Ell. 



i. 



X. 



TM. 



*. 



K. 



II. 5. 





KM= 1931000 









8137 



140-97 



18805000 



10965 



36-38 





7-106 



1231 



1 63 f 0000 



10-679 



32-36 





6072 



105-2 



13815000 



10-33 



28-36 





4 -Do 7 



85-88 



11212000 



10114 



23-515 





3-607 



63-53 



8194400 



9-682 



1795 





2 25 4 



3905 



4931200 



9183 



11-46 







EM = 6213000 









7979 



138-23 



18737000 



11-684 



3401 





7183 



124 45 



1(5746000 



11-345 



31-31 





6-377 



110-47 



14776000 



11-076 



28 30 





5457 



04-54 



12542000 



10-738 



24-78 





4 650 



80-56 



10606000 



10-43 



21-57 





3836 



66-46 



8672000 



10096 



18 22 





3 021 



52-35 



6754000 

 i 



9921 



14-78 



§ 11. From Table IV. we readily obtain some analogies with 

 the values of k ascertained by the earth-inductor. For here 

 again, with sort I., the values corresponding to the ellipsoids 

 with different degrees of eccentricity arrange themselves in a 

 series descending as the eccentricity increases ; on the con- 

 trary, with sort II. the values of k cannot be arranged in a 

 series, but, while II. 2, II. 3, and II. 5 have tolerably equal 

 values of the magnetization-function, II. 4 furnishes, as before, 

 greater values. But now II. 1 also has a sensibly higher mag- 

 netization-function. 



According to this let us form, in conjunction with that pre- 

 viously found, the following representation of the course of 

 k : — After the variously elongated ellipsoids have reached the 

 same (previously noted) minimum of their magnetization- 

 function, the values of k again recede from one another in the 

 softer steel as the magnetizing force X and the permanent 

 magnetism simultaneously increase, while again the greater 

 values of k belong to the less-elongated ellipsoids. With the 

 harder steel, on the contrary, k appears to possess pretty nearly 

 the same value : the higher values of II. 1 and II. 4 may be 

 regarded as produced by differences in the structure of the 

 steel. That k possesses a certain degree of variableness is pro- 

 bably beyond doubt ; yet although the permanent magnetisms 

 are not sufficiently varied, thus much can be seen, that this 

 variability in sort II. is not very great. With a doubled per- 

 manent magnetism, II. 3 and II. 4 do not exhibit any change 



