On the Self-induction of Wires. 



Sequences of Reversals of Magnetism of Soft-iron Bar. 

 p = magnetic resistance, in centimetres. 



63 



.+5 









































I 



B- 







































/// 

 /,■' 

 ',/ 

 '/I 



■' 



/ 





1 \ 



|s. N 













































































































I 



\ 



V 



( 



»fi 



i R 



inj 



a! 

 1 



C 

 fS 



ur 

 01 



ve 



z 























r i i 







original ascending sequence. 



{A. ■ original asceiiumg sequence 

 B second ascending sequence. 

 C descending sequence. 



The length of the ring is supposed to be the same as that of 

 the bar ; i. e. 28'55 centim. 



VI. On the Self-induction of Wires. — Part VII. 

 By Olivek Heaviside*. 



[Errata. — Part V. Equation (25a), for read C 2 , and for (m 2 read 

 (m 2 -\-n 2 ). Last equation on page 23, put/? after the }- in the nume- 

 rator. Part VI. Equation (46c), for 2c 3 read 2occ v Fifth line from 

 end of page 200, for L 2 read L' 2 . Second line on page 201, for x read z.] 



QOME Notes on Part VI — (1) After my statement on 

 pp.177, 178, vol. xxiii., of the general condition of conjugacy 

 of a pair of conductors, and the interpretation of the set of 

 equations into which it breaks up, I stated that in cases where, 

 by the presence of inverse powers of p, there could not be any 



* Communicated by the Author. 



