1902.] on the Electric Conductivity of Iron and Nickel. 41 



Experiment J'. — ■Transverse Effect in Iron. 



An attempt was also made to measure the transverse effect in iron, 

 using the same method as in Experiment III. The effect observed 



Table I. — Dimensions of Wires used in the Experiments. 



Experiment. 



Diameter 

 of wire in 

 millimetres. 



ivesistance. 

 Ohms per 

 centimetre. 

 15° C. 



Actual 

 resistance 

 of coil in 

 ohms. 15° C. 



JLotai 

 length of 

 wire in 

 centimetres. 



Ordinary fields — 













0*330 



-01450 



1-83 



127 



Steel 



0-765 



-00382 



1 -01 



263 





0-765 



0-00217 



0-573 



264 



High fields — 











Nickel. Exp. I .. 



0-200 



-02900 



6-90 





„ II 



)> 





1-31 





„ HI 



) j 





4-65 





„ IV .. 







0-57 





Iron „ V .. 







1-40 





Table II. — The Longitudinal Effect for Nickel, Iron, and Steel. 

 (Ascending reversals for mean temperature 10° C.) 





Nickel. 



Soft 



iron. 



Steel. 



H. 



I. 



a<p x io- ,; . ; 



I. 



Ap x 10-". 



I. 



A<p x 10- 6 . 



10 



20 

 30 

 40 

 50 

 60 

 80 

 100 

 150 

 200 

 250 

 300 

 350 

 400 

 450 

 790* 

 11000* 



10 



60 

 178 

 225 

 256 

 277 

 305 

 327 

 366 

 393 



! 411 

 426 

 436 

 446 



! 456 

 474 



— ■ ! 



ioo i 



550 



1250 



1900 ! 



2450 



3500 ! 



4400 



6300 | 



8050 



9400 j 

 10500 

 11400 

 12300 

 12900 | 



| 17000 



680 

 1040 

 1180 

 1230 

 1270 

 1300 

 1340 

 1370 

 1430 

 1470 

 1500 

 1530 

 1560 

 1580 

 1590 



50 

 210 

 340 

 440 

 520 

 590 

 700 

 800 

 1040 

 1240 

 1400 

 1550 

 1670 

 1760 

 1850 



70 

 800 

 1150 

 1230 

 1260 

 1280 

 1320 

 1360 

 1420 

 1470 

 1500 

 1530 

 1560 

 1580 

 1600 



300 

 470 

 545 

 600 

 710 

 823 

 1055 

 1270 

 1460 

 1640 

 1780 

 1920 

 2030 



Resid. "1 

 (max.) J 



250 



900 



840 



70 



1120 



180 



Note (*) refers to Experiment I in strong fields. 



