1869.] Dr. JB. Stewart on the Kew Magnetic Curves. 465 



In the following Table we have these various measurements ranged in 

 order of date, the unit of the scale adopted being of an inch. 



Table I. 



Measurements of the Peaks and Hollows in the Kew Magnetograph 



Curves. 



Date. 



Time. 



Decli- 

 nation. 



XT • 



Hori- 

 zontal 

 force. 



Ver- 

 tical 

 iorce. 



1 Date. 



Time. 



Decli- 

 nation. 



Hori- 

 zontal 

 force. 



Ver- 

 tical 

 force. 



1858. 



h 



m 









1858. 



- 



h m 









May 22. 



*5 



1 S 



30 



21 



10 



Dec. 13. 



21 10 



24 



16 



8 



22. 



18 



30 



35 



J 5 



7 



16. 



I 7 15 



39 



18 



10 



29. 



16 



J 5 



49 



28 



1 6 



16. 



23 



17 



13 



9 



June 3. 



16 



10 



22 



9 



5 



17. 



15 12 



55 



45 



20 



3- 



17 



25 



45 



19 



1 1 



18. 



20 6 



64 



58 



25 



4- 



16 



J 5 



42 



23 



1 1 



23- 



19 18 



23 





6 



4- 



19 



10 



24 



1 1 



6 



1859. 











July 6. 



18 



17 



23 



11 



5 



Jan. 8. 



23 45 



42 



32 



14 



23- 



15 



10 



20 



13 



6 



10. 



20 



103 



82 



32 



24. 



17 



10 



35 



*9 



6 



17- 



15 40 



*9 



9 



4 



26. 



13 



55 



52 



5i 



25 



17- 



21 45 



23 



15 



7 



3°- 



17 



55 



20 



13 



7 



18. 



23 15 



36 



22 



12 



Aug. 1. 



2 







17 



23 



14 



19. 



18 20 



17 



13 



5 



10. 



2 



16 



14 



11 



5 



19. 



20 10 



47 



34 



12 



12. 



4 



20 



15 



18 



10 



29. 



J 4 55 



23 



H 



7 



13- 



17 



30 



24 



17 



8 



30. 



14 10 



9 



7 



4 



*3- 



18 



43 



l 9 



12 



5 



3°- 



21 48 



21 



17 



9 



17- 



12 



54 



14 



18 



9 



Feb. 1 . 



20 50 



54 



3 6 



H 



24. 



18 



14 



J 9 



11 



5 



10. 



2 27 



55 



4 1 



*9 



26. 



1 





16 



25 



1 1 



10. 



15 5° 



20 



13 



7 



28. 



20 



20 



33 



23 



10 



14. 



18 



32 



21 



7 



Sept. 2. 



18 







20 



10 



5 



i5- 



23 3° 



21 



15 



7 



11. 



16 



2 



11 



7 



4 



16. 



J 9 45 



18 



11 



5 



13- 



21 



47 



16 



12 



4 ! 



21. 



2 50 



37 



40 



17 



2 3- 



10 



5° 



8 



!9 



6 



22. 



r 4 50 



35 



4i 



17 



23- 



11 



55 



9 



J 5 



7 



22. 



16 10 



82 



55 



24 



23- 



12 



56 



10 



18 



6 



March 2. 



21 30 



25 



16 



7 



25- 



23 



10 



40 



39 



20 



3- 



21 40 



21 



15 



5 



26. 







3° 



J 9 



18 



10 



9- 



18 40 



27 



14 



8 



26. 



3 



20 



32 



38 



23 



10. 



20 40 



42 



22 



10 



29. 



*9 



35 



21 



J3 



4 



10. 



22 10 



25 



21 



10 



29. 



20 



10 



16 



II 



6 



11. 



55 



18 



18 



8 



Oct. 2. 



18 



10 



J 5 



9 



5 



11. 



1 30 



1 1 



63 



18 



8 



8. 



20 



20 



28 



22 



10 



11. 



16 50 



40 



17 



i5- 



1 



22 



H 



14 



5 



11. 



18 30 



19 



10 



4 



15- 



3 



48 



10 



15 



4 



12. 



22 10 



21 



13 



6 



18. 



23 



52 



108 



70 



3i 



x 3- 



18 45 



18 



9 



4 



21. 



*9 



27 



27 



17 



7 



16. 



17 50 



15 



10 



5 



24. 



18 



56 



28 



16 



7 



16. 



20 50 



54 



42 



18 



27. 



22 



40 



43 



40 



J 9 



16. 



22 35 



93 



83 



40 



27. 



23 



7 



44 



38 



27 



17. 



20 30 



45 



28 



13 



28. 



!9 



20 



12 



7 



5 



22. 



5 30 



11 



12 



7 



29. 



T 4 







28 



32 



J 5 



26. 



19 30 



28 



20 



10 



Nov. 2. 



12 



5° 



20 



3i 



10 



27. 



23 40 



18 



15 



6 



2. 



22 



5o 



26 



18 



7 



29. 



20 10 



61 



38 



22 



12. 



3 



20 



43 



47 



J 9 



30. 



20 



59 



38 



18 

 26 



19. 



21 



17 



30 



20 



7 



3 1 - 



19 30 



IOI 



53 



23. 



1 



28 



32 



27 



12 



April 6. 



18 55 



25 



16 



8 



24. 







5o 



20 



19 



11 



7- 



23 4 



23 



21 



8 



