290 



TABLE 303. 



COMPOSITION AND MAGNETIC 



This table and Table 289 below are taken from a paper by Dr. Hopkinson * on the magnetic properties of iron and steel. 

 which is stated in the paper to have been 240. The maximum magnetization is not tabulated ; but as stated in the 

 by 4ir. " Coercive force" is the magnetizing force required to reduce the magnetization to zero. The '"demag- 

 previous magnetization in the opposite direction to the " maximum induction" stated in the table. The "energy 

 which, however, was only found to agree roughly with the results of experiment. 



* Phil. Trans. Roy. Soc. vol. 176- 

 SMITHSONIAN TABLES. 



t Graphitic carbon. 



