376 Mr. H. Tomlinson on the Temperature at which 



results are given in the following table, which is supplemented 

 by the curves in fig. 1. In fig. 2 are given Berson's curves 

 for nickel, and in fig. 3 similar curves obtained by Ledeboer* 

 for iron. 



Table I. 



Magnetizing 

 force. 



1 4-959 



6-612 



9-918. 



11-571. 



18183. 



Temperature, 





















in degrees 



Centigrade, 



t. 



Permeability, 



t. 



M p . 



t. 



M p . 



t. 



Up. 



t. 



MP. 



165 



93-4 



19-5 



88-8 



20 



88-6 



19 876 



18 



820 



84-5 



127-9 



55-0 



971 



54 



934 



47 DM 



60 



84-4 



117-6 



125-7 



93 



101 -o 



74 



93-4 



84 ! 89-8 



79 



87-6 



128-0 



125-0 



127 



97-6 



83 



941 



133 95-2 



102 



90-8 



1600 



126-4 



160 



1070 



102 



95-6 



178 97-4 



143 



89-6 



200-0 



1279 



186 



1081 



143 



1029 



191 101-5 



174 



91-6 



227-0 



130-9 



227 



L20-7 



157 



103-7 



275 105-6 



186 



926 



2610 



141-2 



279 



126-3 



204 



106-3 



286 1040 



254 



92-4 



282-0 



1441 



301 



111-4 



247 



111-8 



295 100-9 



293 



90-2 



2970 



142-6 



349 



60-7 



262 



1121 



330 63-0 



316 



72-2 



. O .u4-o 



139-7 







275 



112-9 



346 



542 







3065 



1250 







308 



96-3 











317-0 



1029 







340 



651 











120 220 320 



TEJAPERATURE DECREES CENTIGRADE 



* Both these and Berson's curves are taken from the ' Electrician,' 

 vol. xx. No. 505. 



