1889.] Electro-chemical Effects on Magnetising Iron. 



179 



Table E — continued. 





Electro -chemical effect between 



north and south polar terminals 





of magnetised steel bars. 



E.M.F. in volt. 



The electro- 





chemical position of the north polar terminal was positive, 



Time 



except where otherwise indicated. 













from 



Column 5. 





Column 6. 





commence- 











ment of 



















experiment. 



Nitric acid and 











potassium 



Nitric acid, potassium bichromate solution, and 





bichromate 



ferric chloride solution. 





solution. 









seconds. 



_ 















A -AAQ 



— u uuy 



A «AQA 

 U UoU 



A "Al A 

 — U U1U 



15 











30 





a -fin /i, 



— U UU<± 



A -AQA 

 — U UoU 



A -AT Q 

 U UlO 



45 











minutes. 



* 









1 



0-006 



— U UU4; 



A «AQQ 

 U Uoo 



A -Al 1 

 U Ull 



2 





A -AA/L 

 U UU4fc 



A • AAQ 



u uuy 



A -Af>0 



u uuy 



3 



-0-009 



A • AAQ 

 U UUo 



A - AAA 

 U UUU 



A -AQQ 

 U Uoo 



4 



- -009 



a -aaa 

 u uu^b 



A -AAQ 

 U UUf 



A -A9Q 

 U UiSO 



5 



o-ooo 



a -aaa 



A -A9Q 

 U UZo 





6 



0-004 



a -aaq 



U UUo 



A -AAQ 



u uuy 



A «AOO 

 U UZo 



7 



0-006 



a -AAQ 



u uuy 





U UZ/ 



8 



-009 



a- aa« 



U UUo 



A -AA/1 

 U UU4 



A -Al 1 

 U Ull 



9 



0-009 



-009 



-004 



o -ooo 



10 



o-oio 



a -nn/f. 



U 



A -Al A 





11 



013 



u uu^ 



A -Al A 

 U U1U 



A - A AO 



u uuy 



12 



-014 



a • aaa 



U UUO 



A - A Aft 

 U UUO 



A -AAfi 

 U UUO 



13 



-on 



U Ull 



A -AAfi 

 U UUO 



A - A A/1 

 U UU4? 



14 



0-027 



A -Al 1 

 U Ull 



A •f\C\A 

 U UU4 



A -AA/( 

 U UU4 



15 



0-054 



A .Al A 



U U14 



A .AA£! 



U UUo 



U UU4 



16 



0-158 



0-014 



0-006 



0/004 



17 





0-018 



009 



004 



18 





0-013 



011 



0-009 



19 





011 



o-oio 





20 





010 



0-006 





21 





0-004 



0-006 



0-002 



22 







0-004 



0-004 



Zo 







0-009 



0-004 



24 







0-009 



0-006 



25 





0-004 



0-004 



0-004 



26 







0-004 



0-009 



27 ' 





0-004 



006 



0-004 



28 







o-oio 



0-006 



29 







0-009 





30 







0-009 



o-ooo 



35 







o-oio 





40 











45 







0-014 





47| 











50 











55 











hour. 

 1 











