1911-12.] Transverse Induction Changes in Demagnetised Iron. 297 
of each molecule for the same parallels of latitude in reference to the polar 
demagnetising force ab (fig. 1), be summed up for values of +H increasing 
from zero, curves may be plotted for the various zones with which the 
experimental results may be compared. These curves may also be com- 
pounded with each other as may be found necessary. 
An example of the numerical calculations involved is shown in the 
annexed table, the demagnetising angle being 0 = 45°, the zone 15° N. 
0 = 45°. Zone = 15° N. parallel. 
V2 
CD 
Horizontal Ordinate of Fig. 2. 
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Transverse \ 
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0 
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4 
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297 
- -06 
301 
- -06 
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335 
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- -47 
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1 
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change / 
0 
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•14 
•23 
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Total transvei 
change 
rse | 
0 
T7 
*36 
•29 
*09 
- T1 
... 
-*35 
