492 



Mr. J. L. W. Gill on the Distribution of 



The effect of saturation at the centre is shown in figs. 5 and 

 6, especially in fig. 6, where saturation begins at a very low 

 value of the induction (see fig. 3). The observed and cal- 

 culated values of the induction for other specimens are given 



in Tables IV., V. 



VI. 



Table 



IV. 



Distance 







Induction for 



different fields. 





from centre 

 of specimen 

















I 











in cm. 



Obs. 



Oale. 



Obs. 1 Calc. 



Obs. 



Calc. 



Obs. 



Calc. 







12-10 





4460 ! ... 



7600 





1 10600 





1 



1217 



1220 



4410 4385 



7500 



7475 



10420 



10420 



2 



1163 



1157 



4220 | 4160 



7090 



7090 



: ioooo 



9900 



3 



1068 



1052 



3760 3785 



6470 



6450 



, 9030 



9000 



4 



908 



901 



3240 3240 



5550 



5525 



7780 



7700 



5 



677 



695 



2505 2505 



4290 



4265 



1 5970 



5950 



6 



422 



420 



1495 1510 



2550 



2575 



3590 



3590 



Table giving observed and calculated distribution for specimen No. 10 (see 

 Table III.). 



Table V. 



Distance 







Induction for different fields. 







from centre 

 of specimen 





















1 









in cm. 



Obs. 



Calc. 



Obs. 



Calc. 



; Obs. 



Calc. 



Obs. 

 7170 



Calc. 







1128 





2490 



5180 







1 



1110 



1112 



2460 



2460 



5100 



5120 



7070 



7075 



2 



1078 



1069 



2340 



2360 



4920 



4915 



6810 



6800 



3 



1010 



998 



2205 



2205 



! 4600 



4580 



6320 



6350 



4 



901 



895 



1980 



1982 



i 4130 



4110 



5650 



5680 



5 



767 



756 



1710 



1668 



1 3520 



3470 



4770 



4810 



6 



598 



579 



1290 



1275 



2670 



2655 



3650 



3675 



7 



345 



345 



775 



762 



1590 



1585 



2150 



2190 ; 



Table giving observed and calculated distribution for specimen No. 9 (see 

 Table III.). 



Table VI. 



Distance 







Induction for different fields. 







from centre 

 of specimen 





























in cm. 

 



Obs. 

 1980 



Calc. 



Obs. 



Calc. 



Obs. 



Calc. 



Obs. 



Calc. 





4314 





6470 





8725 





1 



1955 



1945 



4230 



4240 



6360 



6360 



8550 



8575 



2 



1842 



1840 



4000 



4010 



5960 



6010 



8110 



8100 



3 



1670 



1670 



3620 



3640 



5465 



5460 



7350 



7350 



4 



1417 



1418 



3073 



3090 



4618 



4635 



6230 



6250 



5 



1090 



1075 



2328 



2350 



3505 



3520 



4785 



4750 



6 



612 



615 



1323 



1340 



2015 



2010 



2740 



2710 



Table giving observed and calculated distribution for specimen No. 7 (s 

 Table III.). 



