Magnetic Declination, 1845. 



TABLE XI. — Mean Difference of a Single Observation of the Magnetic Declination, from the Monthly 

 Mean at the corresponding Hour, for each Civil Day and Week in 1845. 



CivQ 

 Day. 



I 



Jan. 



Feb. 



March. 



April. 



May. 



June. 



July. 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 



1-57 



1-64 



1-32 



1-13 



3-00 



[1-94] 



1-45 



3-23 



1-94 



1-33 



2-51 



107 



2 



1-91 



[1-55] 



[1-75] 



MO 



1-35 



1-22 



1-64 



2-53 



3-21 



0-92 



[2-07] 



1-51 



3 



1-35 



M3 



1-27 



1-49 



1-66 



Ml 



M4 



[2-06] 



2-71 



1-64 



201 



505 



4 



1-53 



1-20 



1-47 



1-30 



[1-63] 



2-14 



1-42 



2-53 



1-88 



M2 



1-45 



310 



5 



[1-63] 



2-39 



1-30 



0-91 



1-32 



0-93 



0-73 



1-95 



1-55 



[1-22] 



3-40 



2-16 



6 



1-74 



1-81 



1-54 



[1-24] 



1-45 



0-73 



[1-38] 



M2 



1-33 



1-55 



1-31 



1-00 



7 



1-48 



1-20 



1-32 



1-40 



1-01 



1-42 



1-53 



1-40 



[1-92] 



0-98 



304 



[1-52] 



8 



1-79 



0-94 



1-24 



1-35 



0-72 



[1-30] 



1-71 



2-64 



2-93 



1-09 



1-69 



0-89 



9 



4-04 



[113] 



[1-29] 



0-99 



0-72 



2-03 



1-73 



2-01 



1-73 



3-01 



[1-65] 



1-21 



10 



3-82 



1-36 



1-08 



0-90 



0-84 



1-05 



1-59 



[1-75] 



2-10 



302 



1-23 



0-77 



11 



1-70 



0-95 



1-07 



Ml 



[1-00] 



1-62 



1-29 



M5 



1-22 



1-46 



1-52 



0-80 



12 



[2-28] 



0-53 



1-52 



0-83 



MO 



077 



MO 



1-84 



1-21 



[1-97] 



MO 



112 



13 



1-70 



1-28 



1-78 



[1-98] 



Ml 



1-38 



[].20] 



1-46 



1-39 



1-42 



0-98 



3-77 



14 



121 



M6 



2-71 



6-47 



1-49 



1-35 



1-21 



1-66 



[1-37] 



1-47 



1-03 



[1-91] 



15 



1-23 



1-24 



1-34 



1-62 



1-90 



[1-09] 



1-25 



1-83 



1-56 



1-45 



1-02 



2-60 



16 



1-38 



[1-22] 



[1-90] 



0-93 



1-64 



0-64 



0-78 



1-35 



0-70 



0-93 



[1-67] 



1-56 



17 



1-01 



1-63 



2-01 



M4 



1-34 



M9 



1-26 



[1-50] 



2-12 



2-36 



2-96 



1-62 



18 



1-44 



0-95 



1-35 



1-81 



[1-60] 



1-24 



1-00 



2-42 



2-70 



1-28 



2-13 



1-68 



19 



[2-00] 



1-05 



1-99 



2-07 



2-53 



0-49 



1-49 



0-85 



1-74 



[2-25] 



1-88 



0-95 



20 



505 



1-78 



2-62 



[1-50] 



1-21 



100 



[Ml] 



0-87 



1-66 



2-34 



1-24 



1-22 



21 



1-80 



3-50 



1-32 



1-72 



1-01 



1-88 



0-96 



1-27 



[1-89] 



4-80 



1-74 



[M8] 



22 



1-35 



2-01 



M7 



1-22 



1-70 



[1-05] 



0-53 



1-23 



1-39 



1-81 



112 



1-04 



23 



1-68 



[2-99] 



[2-38] 



1-04 



0-92 



0-78 



1-40 



1-70 



1-92 



1-30 



[1-47] 



1-24 



24 



2-07 



5-15 



3-72 



2-10 



M4 



M2 



215 



[1-35] 



1-91 



1-39 



1-28 



0-98 



25 



2-39 



2-92 



2-56 



2-07 



[M7] 



1-03 



5-58 



1-34 



5-47 



1.80 



1-79 



0-93 



26 



[2-40] 



2-58 



2-90 



1-29 



116 



0-64 



0-99 



1-68 



2-13 



[1.29] 



1-64 



0-97 



27 



2-34 



2-74 



2-00 



[1-97] 



0-97 



0-58 



[1-97] 



0-90 



3-68 



0-94 



1-59 



0-71 



28 



1-81 



2-43 



207 



3-56 



Ml 



1-64 



115 



1-24 



[2-67] 



1-29 



1-47 



[1-45] 



29 



4-14 





1-89 



1-08 



0-85 



[1-32] 



102 



4-43 



1-79 



1-01 



2-57 



1-89 



30 



1-77 





[1-55] 



1-73 



2-16 



2-00 



0-93 



3-78 



1-62 



1-03 



[2-21] 



2-17 



31 



M8 





Ml 





4-16 





100 



[2-88] 





2-05 





2-05 



TABLE XII. — Mean Difference of a Single Observation of the Magnetic Declination from the Monthly 

 Mean at the corresponding Hour, with reference to the Moon's Age and Declination, for 1845. 











After 





After 





Moon's 



Mean 



Moon's 



Mean 



Moon 



Mean 



Moon 



Mean 



Age. 



Diflference. 



Age. 



Difference. 



farthest 

 North. 



Difference. 



farthest 

 North. 



Difference. 



Day. 



' 



Day. 





Day. 



' 



Day. 



' 



15 



1-57 







1-57 







1-38 



14 



1-55 



16 



1-72 



1 



1-78 



1 



1-71 



15 



1-38 



17 



1-61 



2 



1-72 



2 



1-89 



16 



1-44 



18 



203 



3 



1-34 



3 



2-33 



17 



2-32 



19 



1-84 



4 



1-82 



4 



1-79 



18 



1-73 



20 



2-02 



5 



1-62 



5 



2-09 



19 



1-62 



21 



2-28 



6 



1-67 



6 



1-80 



20 



1-40 



22 



1-69 



7 



1-44 



7 



1-93 



21 



1-29 



23 



1-40 



8 



2-11 



8 



201 



22 



1-57 



24 



1-87 



9 



1-66 



9 



1-90 



23 



1-81 



25 



1-78 



10 



132 



10 



1-90 



24 



1-22 



26 



1-84 



11 



1-40 



11 



1-57 



25 



1-44 



27 



1-69 



12 



1-75 



12 



1-48 



26 



1-43 



28 



1-75 



13 



1-47 



13 



1-85 



27 



1-48 



29 



1-65 



14 



148 











