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ROYAL SOCIETY OF CANADA 



Outline of Method: — The intention was to make determinations 

 of the specific resistance at a considerable number of dilïerent temper- 

 atures, but lack of time confined the observations to five particular 

 points — namely, that of li([uid air, about — 185° 'C, that of carbonic 

 acid snow and other, al)out "îî" C, that of melting ice, boiling water, 

 and that of paraffin heated to 1G0° C. 



TABLE I. 



Eight rods each about 15 cms. long, whose distinguishing marks 

 are lA, 2, 2A, 3, 3A, 3B, 4. 4-/V. and whose percentage composition is 

 shewn in Table I were examined. 



Before beginning the study «^f the resistance of the samples their 

 permeability was roughly determined for purposes of comparison. To 

 do this a ballistic method was employed, the rods being placed in a 

 glass tube wound with a secondary coil, which was itself in turn placed 

 inside a standard primary-. ISTo correction was made for end ofFocts 

 as a comparison of the relative magnetization values of the different 

 specimens was all that was desired. 



