Dr. C. Fromme on the Magnetism of Steel Bars. 295 



institute some experiments for the calculation of the magneti- 

 zation-function k for the forces with which this happens. 



After the ellipsoids had been annealed for the first time, I 

 again made a series of experiments with the vertical component 

 of the earth's magnetism for the ellipsoids of sort I. 



h. 



K. 



LI. 









2. 



23-7041 



0-20943 



3. 



18-6999 



0-34211 



4. 



16-2162 



0-54715 



,5. 



11-3674 



1-09090 



(The observation with I. 1 miscarried.) These values are, 

 in consequence of the hardness being diminished by the an- 

 nealing, all greater than those previously obtained. The ellip- 

 soids were next brought by a constant magnetizing force to 

 the moment of saturation thereto belonging ; and then the 

 magnetization-function for a descending force was calculated. 



Table IV. gives the current-intensities i, the magnetizing 

 forces X, the permanent magnetism (constant in each series of 

 experiments) RM — the invariability of which was investigated 

 after each single observation, — the temporary moments TM, 

 and the magnetization-function k, with its argument K. The 

 care with which the experiments were conducted is attested by 

 the values of k with their slight differences. 



Table IV. 



EU. 



i. 



X. 



TM. 



h 



E. 



I. 1. 





E 



M = 15860. 









4774 

 2-262 



82-71 

 39-19 



E 



1663600 

 789060 



M= 79320. 



25-34 

 26-3 



2-453 

 1121 





1029 

 8-047 

 4-765 

 2-255 



178-2 

 139-4 

 82-56 

 39-07 



3606000 



2819800 



1666100 



7S7840 



31-86 

 31-19 

 28-53 

 27-74 



4 231 



3-379 

 2183 

 10!J2 



I. 2. 





I 



,M = 255800. 









9-921 

 7-348 

 5-721 

 3-857 

 1-795 



1719 

 127-3 

 9912 

 66-82 

 31-09 



7076400 

 5162600 

 4035000 

 2708600 

 1255500 



27-25 



2002 

 21-44 

 19-86 

 1864 



7-287 

 7-237 

 5-281 

 3-828 

 1-891 



I. 3. 





I 



«M = 133500. 









5-763 

 4-433 

 3-303 



99-84 



768 



5723 



7029000 

 5408400 

 4004600 



16-42 

 16-47 

 15-35 



8-9 



6-826 



5-421 



