162 Dr. E. Taylor Jones on 



The greatest value of the integral - j 



H<#I was in the iron 



550, in the steel 840 grms. weight per sq. centim. This 

 only gives, therefore, a correction of a few per cent. In my 

 former experiments the corresponding correction (there due 

 to the slight non-uniformity of the field inside the coils) was 

 only about ^ pro mil. (Wied. Ann. 1. c. p. 649, footnote). 



Table II.— Former results (Phil. Mag. I c. p. 265) 



I. 

 aa.s. 



B. 

 O.G.S. 



B 



Observed. 



Difference. 



Vg^"" 







Calculated. 







493 



6198 



39-2 



39-2 



00 



551 



6929 



43-9 



44-4 



+0-5 



646 



8122 



51-6 



51-6 



o-o 



853 



10730 



68-1 



68-4 



+0-3 



996 



12520 



794 



790 



-0-4 



1163 



14630 



92-9 



92-0 



-0-9 



1291 



16260 



1033 



102-9 



-0-4 



1346 



16970 



1077 



107-3 



-0-4 



1400 



17690 



1123 



111-9 



-0-4 



1463 



18540 



117-7 



1171 



-0-6 



1550 



19730 



1253 



123-5 



-1-8 



1585 



20230 



128-4 



126-7 



-1-7 





Table III. — Annealed Soft Styrian Iron. 



Current, 

 Amperes. 



H. 



C.G.S. 



B. 



c.a.s. 



I. 



C.G-.S. 



B. 



G. 



Obs. 



Difference. 



s/S^g- 

 Calc. 







260* 



17740 



1392 



113-0 



109-5 



-3-5 



0-13 



613 



22050 



1707 



140-5 



138 



-2-5 



0-37 



1440 



23370 



1745 



1489 



147-0 



-1-9 



0-93 



3470 



26140 



1805 



166-5 



162-0 



-4-5 



1-33 



5070 



27420 



1779 



174-7 



172-0 



-2-7 



26 



8560 



31220 



1803 



198-9 



195-0 



-39 



3-8 



10520 



33370 



1818 



212-5 



207-5 



-50 



5-6 



12720 



34660 



1746 



220-8 



2195 



-1-3 



79 



14230 



35790 



1716 



2279 



228-3 



+0-4 



9-8 



14850 



36450 



1719 



232-1 



232-8 



+ 0-7 



14-9 



16030 



38270 



1770 



243-8 



239-8 



-4-0 



25-0 



17690 



39260 



1796 



250-1 



250-9 



+0-8 



Due to residual magnetism in the pole-pieces. 



