﻿450 Prof. Lyle and Mr. Baldwin on Propagation of 



Table XT. — Specimen A reduced to Z = 45 cms. 

 T=-()Bll. 



C = 1734 sin 10 



'+•0077 sin 3(^-58-3) + -0003 sin 5 (ait -27). 



X. 



fv 



A- 



1 



fir 



fi s - k-e . 



K 



0......... 



3820 



94-9 



291 



32-01 



88-37 



27-95 



■0862 



6 



2480 



106-5 



21-9 



4393 



86-38 



2888 11-92 



•1032 



10 



1502 



753 



15-4 



55-44 



8616 



28-13 



23-43 



•1139 



15 



850 



41-1 



7-2 



64-26 



89-41 



31-94 



32-25 



•2048 



20 



305-3 



13-9 



2-5 



70-11 



91-65 



30 36 



38-10 











From the tables and from fig. 6 it will be seen that short- 

 ening the rod makes little perceptible difference either to the 

 leakage of the flux or to its phase-lag until a point is reached 

 at which the end effect begins to assert itself. Thus for the 

 different lengths, flux- waves that are equal at the magnetizing 

 coil are practically equal in all their characteristics after 

 travelling equal distances along the rod, provided they have 

 not reached to within 30 cms. or so from the ends. 



9. The next specimen (B) tested was a rod of silver-steel 

 of low permeability of the same section as specimen A. One 

 frequency with one initial flux only was used, these being 

 (q. p.) the same as in one of the series (Table III.) of experi- 

 ments with specimen A, so that a direct comparison of the 

 behaviour of the two materials could be readily made. 



Details of Specimen B. 



A straight cylindrical rod of silver-steel. 

 Length = 286*6 cms. Diameter = "653 cm. 

 Section = '3351 cm 2 . 



Magnetizing solenoid and search-coils the same as 

 were used with specimen A. 

 Specific resistance = 1*859 x 10 4 . 



Statical Permeability for different inductions. 



B 



50 



500 



1000 



2000 



4000 6000 



8000 



10000 



12500 15000 



/* 



73 



96 



122 170 | 248 



i 

 298 316 290 



1 



i ; 



222 j 140 



