1887.] Electrochemical Effects on Magnetising Iron. 465 



Table A — continued. 







E.M.F. in volt, and electrochemical position of 



magnetised 







bar compared with the unmagnetised bar, the positive or 







negative position of the former be] 



ng respectively indicated 







by the signs + and - 









Time from 



Column 4. 



Column 5. 



Column 6. 



commencement 













and duration 













of magnetisation 



Potassium 







Nitric acid, s 

 one part, 

 parts 





in minutes. 



bi-chromate 

 and nitric 

 acid. 



Ferric chloride and 

 nitric acid. 



p. gr. 1-388, 

 and three 

 ivater. 







II. 



I. 



II. 



I. 



II. 



hrs. 



mins. 





















'000 



0*000 



o-ooo 



o -ooo 



o-ooo 







1 





•• 



-0-004 



+ 0-026 



+ 0*004 







2 



+ '009 





+ 0-002 











21 



+ "005 





+ 0-002 



+ • 020 



+ 0-005 







3 



+ • 009 





+ 011 



+ 020 



+ -007 







4 



+ "010 





+ 0-013 



+ 0-016 



+ 0-C09 







5 



+ '007 





+ 0013 



+ 0*014 



+ • 009 







6 







+ 0-020 











7 







+ 0-016 

















+ -006 



+ 0*011 



+ -on 







8 







+ 0-022 











9 







+ 0-034 





+ -on 







10 



+ ' 006 





+ o -on 



+ * 008 



+ *011 







11 







+ 0-014 











12 







+ 0-011 



** 









12£ 



+ *009 









+ *010 







13 



** 





+ -009 











14 

















15 



+ '004 





+ 0-002 



+ 0-009 



+ *005 







16 



" 











u 



















m 







+ 0-009 



" 









19 

















20 



+ * 007 



+ 0*009 



+ 0-007 



+ • 007 



+ *005 







22^ 

















25 



+ 0*005 



+o'-bis 



+ '004 



+ 0-001 



+ 0*003 







30 



+ ' 003 



+ -038 



+ 0-002 



+ 0-001 



+ *004 







35 



+ 0-001 



+ 0-038 



+ 0-003 



+ o -on 



+ 0*004 







40 



+ -004 



+ 023 



+ -002 



+ 012 



+ *004 







45 



+ -ooi 



+ 0-002 • 





+ 0-013 



-r0*004 







50 



+ -002 



+ O -004 





+ 0-009 



+ 0*006 







55 





+ -005 





+ 0-012 



+ 0*007 



1 







+ 0-006 



+ 0-006 



+ 0-001 



+ 0*013 



+ 0*007 



1 



5 













1 



15 













1 



30 













1 



45 













2 









+o'-bo7 









2 



20 













3 

 3 





 15 













2 l 2 



