178 



Mr. T. Andrews. 

 Table E. 



[June 6, 





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, 





except where otherwise indicated. 





Time 











from 



Column 1. 



column z. 



column o. 



Column 4. 



commence- 











ment of 







Mtric acid, 



Nitric acid, 



experiment. 







sp. gr. 1*42, 



sp. gr. 1*42. 



Cupric 

 chloride. 



Cupric 

 bromide. 



and potassium 



one-third, and 





bichromate 

 (cone, solution) 

 in equal 

 volumes. 



potassium 

 bichromate 

 (cone, solution), 

 two-thirds. 



seconds. 

























15 



0*001 









30 



-002 



0*007 



0-009 





45 



0-002 









minutes. 











1 



0-002 



o-oio 



-005 



0-009 



2 



-006 



O'Oll 



-004 



0-009 



3 



0-006 



o-oii 



0*006 



0-004 



4 



o-oio 



0-Q16 



-005 



0-009 



5 



-014 



-029 



0'006 



o-oii 



6 



0-016 



0-045 



0-008 



0-011 



7 



0-023 



0*051 



0*009 



0-011 



8 



'038 



0-050 



"009 



011 



9 



0*054 



0*047 



o-oio 



o-oio 



10 



0-063 



032 



"011 



0-009 



11 











12 



0-051 



0-032 



0-011 



-009 



13 











14 











15 



0-023 



0-029 



o -on 



0-009 



16 











17 



0-009 









18 











19 











20 



0-006 



0-029 



o-oio 



0-027 



21 











22 











23 











24 











25 



0-006 



0-040 



0-013 



0-014 



26 











27 











28 











29 











30 



0-009 



0-031 



0-018 



0-018 



35 





0-021 



0-025 



0-030 



/in 





0-033 



0-026 





45 







0-041 





47i 







0-132 





50 







0-087 





55 







0-054 





hour. 











1 







0-054 



0-018 



