the Intrinsic Field of a Magnet. 



411 



Above the critical point the two curves merge into a straight 

 line, which, if equally inclined to both axes, would mean 

 that the resistance at these high temperatures is directly 

 proportional to the absolute temperature. 



(b) Thermo-Electrical Power. 



The thermo-junctions used here were the same as those 

 described in an earlier part of this paper on the effects of 

 alternating fields, and were constructed of nickel-platinum 

 and iron-platinum. The thermo-electromotive force of this 

 particular platinum against lead was separately determined, 

 and the thermo-electric powers, which are set out in Table III., 

 are in micro-volts per degree referred to lead as the standard. 



Table III. 



Corresponding states for the Thermo-electric Power 

 of Nickel and Iron. 



Nickel. 



Iron. 







Micro- 



Differ- 



Re- 







Micro- 



Re- 



Temp. 



T 



volts 



ence 



duced 



Temp. 



T 



volts 



duced 



0°. 



T c . 



per 



fro i vi 



dE 



i 0°. 



"t7 



per 



dE 







degree . 



233. 



dT. 





c • 



degree. 



dT. 



98 



•560 



-21-8 



+1-5 



•158 



114 



•370 



+ 10-2 



•856 



119 



•591 



-22-1 



1-2 



•126 



152 



•406 



8-7 



•731 



138 



•620 



-22-7 



0-6 



•063 



190 



•443 



7-1 



•596 



157 



•651 



-23-0 



03 



•032 



228 



•467 



5-9 



•494 



176 



•677 



-23-1 



0-2 



021 



266 



•513 



4-1 



•345 



194 



•706 



-232 



o-i 



•010 



304 



•548 



2-9 



•244 



212 



•724 



-23-3 



o-o 



•ooo 



342 



•584 



1-8 



•150 



266 



•813 



-210 



23 



•242 



380 



•621 



0(5 



•050 



301 



•865 



-204 



29 



•305 



456 



•691 



0-3 



•020 



319 



•894 



-19-5 



3-8 



•400 



494 



•727 



00 



o-oo 



337 



•919 



-18-2 



51 



•535 



532 



•763 



0-2 



•018 



354 



•945 



-17-0 



6-3 



•662 



570 



•802 



0-5 



•043 



371 



•968 



-15-1 



8-2 



•861 



608 



•836 



2-0 



T68 



388 



1-00 



-13-8 



9-5 



100 



646 



•870 



3-4 



•285 



405 



103 



-141 



9-2 



•967 



684 



■909 



4-3 



■361 



422 



105 



-14-7 



8-6 



•903 



722 



•944 



71 



•596 



440 



1-08 



-15-2 



8-1 



•861 



760 



•980 



10-6 



•889 



457 



110 



-15-7 



7-6 



•798 



779 



1-00 



11-9 



1-00 



474 



113 



-15-9 



7-4 



•772 



817 



103 



10-0 



•840 



508 



1-18 



-172 



6-1 



•641 



836 



1-05 



9-8 



■824 



The first column for each metal is the temperature in centi- 

 grade degrees ; the second column is the reduced absolute 

 temperature, the absolute critical temperature of the metal 

 being treated as unity ; the third column is the thermo-electric 



