Phil. Mag. Ser. 6, Vol. 17, PI. XV. 









COEFFICIENTS OP 



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AGXETIZATION FOB BaBS OF CIRCULAR SECTION 





























































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ARIOUS FORMS 



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Intensity of field. 



Fio. 8. 

 %-#& Curves for Bars of various forms of section. Area of section 1 sq. centimetre. 

 Length 30 millimetres. 



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120 140 160 180 

 IKUNSITr Of FIELD 



