464 Mr. T. Andrews. [June 16, 



Table A. 



Time from 

 commencement 

 and duration 

 of magnetisation 

 in minutes. 



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

 bar compared with the unmagnetised bar, the positive or 

 negative position of the former being respectively indicated 

 by the signs + and — . 



Column 1. 



Column 2. 



Column 3. 



Potassium chlorate 

 and one-fifth nitric 

 acid. 



Potassium chlorate 

 and one -third nitric 

 acid. 



Potassium chlorate 

 and hydrochloric 

 acid. 



1. 



II. 



I. 



H. 



I. 



II. 



hrs. 



mins. 

























o-ooo 



o-ooo 



o-ooo 



o-ooo 



o-ooo 



o-ooo 







1 





+ -004 



+ 0-014 



+ -002 











2 









+ 0-003 











2§ 





+ 0-006 



+ 0-014 



+ '004 





+ -002 







3 









+ 0-005 











4 







+ 0-016 



+ -006 











5 



+ 0-005 



+ -006 



+ 0-011 



+ 0-007 



+ 0-002 



+ 0-003 







6 



. m 







+ 0-007 











7 



















1\ 





+ 0-001 



+ o'on 



+ 0-008 





+ 0-006 





 



8 



9 



















10 



+ -006 



+ -004 



+ 0-011 



+ 0-008 



+ 0-001 



+ 0-004 







11 



















12 



















m 



•• 



•• 



•• 



- 





•• 







13 



















14 



















15 



-1- -005 



+ -003 



+o'bio 



+ 0-007 



+ -003 



+ 0-004 







m 









+ 0-007 











20 



+ 0-006 



+ 0-003 



+o'-oio 



+ 0-007 



+ -007 



+ 0-004 







25 



+ 0-006 



+ 0-003 



+ 0-010 



+ 0-007 



+ 0-008 



+ 0-004 







30 



+ 0-007 



+ 0-002 



+ 0-010 



+ 0-009 



+ 0-007 



+ 0-005 







35 



+ 0-007 



+ 0-003 



+ 0011 



+ -006 



+ 0-009 



+ 0-004 







40 



+ -007 



+ 0-003 



+ 0-011 



+ -006 



+ 0-008 



+ 0-006 







45 



+ 0-008 



+ 0-003 



+ 0-012 



+ 0-005 



+ 0-007 



+ 0-005 







50 



+ 0-009 



+ 0-002 



+ 0-011 



+ 0-005 



+ -006 



+ 0-005 







55 



+ -008 



+ 0-003 



+ 0-012 



+ -005 



+ -007 



+ 0-006 



1 







+ 0-007 



+ -003 



+ 0-013 



+ -005 



+ 0-007 



+ 0-005 



1 



5 





+ -005 





+ -004 





+ 0-009 



1 



15 









+ 0-005 





+ 0-006 



1 



30 





+ -007 





+ 0-006 



+ 0*009 





1 



45 





+ -006 







+ 0-009 





2 









+ -005 





+ -005 



+ 0-011 





Column 1. — The potassium chlorate was a saturated solution of the salt, to which 

 was added one-fifth of its volume of nitric acid of sp. gr. 1'388 at 60° F. 



Column 2. — The potassium chlorate was a saturated solution of the salt, to which 

 was added one-half of its rolume of nitric acid of sp. gr. 1*388. 



Column 3. — The potassium chlorate was a saturated solution, to which was added 

 an equal volume of hydrochloric acid of sp. gr. 1*16. 



Column 4. — The potassium bi-cliromate was a saturated solution, to which was 

 added one-half of its volume of nitric acid of sp. gr. 1-388. 



Column 5. — The ferric chloride was a saturated solution, to which was added one- 

 half of its volume of nitric acid of sp. gr. 1388. 



