290 Profs. Dewar and Fleming on the Electrical 



Iron A. 



Length = 100 centim. Mean diameter = 0-02657 centim. 

 Mean sectional area = 0*00055445 sq. centim. 



"10 9 section"! 



liOi 



length J 



= 3-7438595. 



R*. 



t°. 



Pt- 



pt. 



4-1935 



1973 



23251 



194-2 



3-4091 



138-8 



18902 



137-6 



2-8368 



90-5 



15729 



90-7 



2-4167 



52-10 



33399 



52-70 



2-0737 



18-50 



11498 



18-90 



1-9104 



1-40 



10592 



1-45 



1-5086 





8364 



- 43-6 



1-1909 





6647 



- 81-9 



0-4223 





2341 



-197-1 



By comparison of resistances of a longer coil of the same 

 wire taken in liqnid oxygen boiling under normal and 

 reduced pressures a lower temperature reading was obtained. 



R*. p t . pt 



3-834 2341 -197-1 



2-983 1820 -219-4 



Volume-specific resistance at 0° C. . = 10512 

 Mean temperature -coefficient between 



0° and 100° C = '"00544 



Iron H. W. 

 Length =100 centim. Mean diameter = 0-023078 centim. 

 Mean sectional area = 0*00041830 sq. centim. 



Kt. 



t°. 



pt. 



pt. 



Remarks. 



5-1395 



196-1 



21499 



193 





4-2536 



145-4 



17793 



144 





3-4976 



98-10 



14631 



98-15 





29546 



60-25 



12359 



60-80 





2-3940 



18-25 



10014 



18-65 





2-1791 



0-70 



9115 



0-70 





1-7137 





7168 



- 39-2 





1-2713 





5318 



- 81-9 



Taken in C0 2 and ether. 



0-2918 





1220 



-197-1 



Taken in liquid oxygen 

 boiling at 760 mm. 



