Results of Makerstoun Observations, 1845. 



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

 Monthly Mean at the corresponding Hour, for each Hour in each Month of 1845. 



Mak. 

 M. T. 



Jan. 



Feb. 



March. 



April. 



May. 



June. 



July. 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 



Year. 



h. 



12 



3-12 



2-61 



1-88 



217 



2-31 



0-86 



1-64 



2-06 



2-59 



233 



1-34 



1-58 



2-04 



13 



3-52 



2-65 



3-03 



2-20 



2-21 



1-14 



1-49 



2 



23 



1-98 



2 



10 



113 



1-59 



2-11 



14 



2-35 



1-82 



2-10 



5-13 



1-36 



1-04 



1-59 



2 



29 



2-41 



2 



04 



1-66 



Ml 



2-07 



15 



3-18 



1-21 



2-44 



2-62 



1-66 



Ml 



1-29 



1 



92 



2-42 





83 



1-58 



1-02 



1-86 



16 



2-06 



1-36 



1-99 



1-50 



0-95 



1-27 



1-95 



1 



41 



1-68 





03 



1-36 



1-45 



1-50 



17 



1-29 



1-09 



1-46 



1-56 



1-27 



1-38 



2-47 



1 



09 



1-98 





36 



0-83 



0-72 



1-37 



18 



1-41 



1-38 



0-95 



1-28 



113 



1-28 



1-93 



1 



38 



2-57 





37 



M7 



Ml 



1-41 



19 



1-56 



0-71 



0-96 



1-35 



1-22 



1-32 



1-58 



2 



30 



2-07 





34 



1-09 



0-99 



1-37 



20 



1-56 



1-28 



1-41 



0-93 



1-83 



1-50 



1-52 



3 



13 



2-81 





45 



1-50 



1-23 



1-68 



21 



1-34 



1-33 



1-57 



0-84 



1-44 



1-47 



1-86 



2 



37 



2-02 





80 



215 



1-31 



1-62 



22 



1-27 



1-26 



1-28 



0-87 



1-53 



1-35 



1-57 



1 



88 



1-69 





49 



1-93 



1-37 



1-46 



23 



1-40 



1-60 



1-28 



0-83 



1-73 



1-78 



1-45 



1 



46 



1-52 





53 



1-55 



1-65 



1-48 







.1-40 



1-58 



1-24 



1-34 



1-77 



1-40 



1-30 



1 



46 



1-48 





47 



1-97 



1-80 



1-52 



1 



1-81 



1-89 



1-39 



1-48 



2-02 



1-54 



1-46 



2 



03 



1-59 





85 



2-00 



2-10 



1-76 



2 



|l-77 



1-47 



1-46 



1-52 



2-22 



1-47 



1-30 



1 



94 



1-53 





96 



204 



1-88 



1-71 



3 



1-55 



2-34 



1-37 



1-60 



1-75 



1-70 



1-38 



1 



94 



1-87 





81 



1-82 



202 



1-76 



4 



1-20 



1-67 



1-24 



1-37 



1-71 



1-42 



110 



1 



69 



1-54 





33 



2-52 



1-58 



1-53 



5 



1-64 



1-90 



1-70 



M6 



110 



1-23 



0-91 



1 



17 



MO 





23 



2-67 



1-73 



1-46 



6 



1-52 



3-40 



2-64 



1-50 



0-87 



0-78 



0-96 



2 



55 



2-43 







66 



1-33 



3-45 



1-84 



7 



2-46 



3-02 



1-95 



1-47 



0-78 



0-75 



0-92 



1 



30 



2-38 







64 



2-38 



1-53 



1-63 



8 



1-96 



2-52 



1-64 



2-20 



0-92 



0-60 



1-02 







89 



2-50 







82 



1-48 



2-39 



1-58 



9 



2-79 



2-46 



3-25 



1-60 



1-22 



0-70 



1-36 



2 



57 



2-65 



2 



36 



1-67 



1-94 



2-05 



10 



2-62 



1-59 



2-55 



1-21 



0-88 



0-79 



0-68 



1 



99 



2-23 



2 



80 



2-90 



1-93 



1-85 



11 



3-68 



1-39 



1-55 



1-39 



1-26 



0-92 



MO 



1-63 



2-40 



3 



20 



1-84 



1-71 



1-84 



TABLE XIV. — Number of Positive and Negative Differences which occur between the limits of 







successive 



Minutes, for each Month, and for the Year 1845. 













0' 



1' 



2' 



3' 



4' 



5' 



6' 



7' 



8' 



9' 



10' 



15' 



20' 



25' 



Above 

 30'. 



Month. 



to 



to 



to 



to 



to 



to 



to 



to 



to 



to 



to 



to 



to 



to 





1'. 



2'. 



3'. 



4'. 



5'. 



6'. 



7'. 



8'. 



9'. 



10'. 



15'. 



20'. 



2.5'. 



30'. 



Jan. 1 ;*; 



121 



90 



92 



27 



u 



5 



1 



2 



2 



2 



1 



... 





... 



... 



130 



85 



33 



11 



5 



4 



4 



5 



5 



2 



4 



3 





3 



... 



Feb. 1 '^ 



114 



107 



41 



16 



11 



9 



2 



2 



1 





2 



... 







... 



... 



120 



87 



22 



15 



6 



5 



2 



3 



2 



2 



3 



2 







.. 



... 



March ^ 



135 



115 



49 



27 



4 



3 



4 



2 



2 



... 



1 



... 







.. 



... 



126 



64 



42 



13 



11 



6 



7 



8 



2 



... 



2 



1 







.. 



... 



April i + 



146 



112 



44 



23 



7 



5 



3 



... 



... 



... 



1 



... 







... 



... 



147 



70 



34 



12 



2 



3 



5 



1 



1 



2 



3 



1 







.. 



1 



May { + 



171 



HI 



35 



14 



3 



3 



1 



2 



1 



1 



3 









• • 



... 



134 



83 



43 



27 



6 



4 



3 



1 





... 



2 



... 







... 



... 



June ■ 



160 



72 



27 



15 



7 



3 



2 



1 



... 



... 



... 



... 







• • 



... 



162 



97 



40 



10 



3 





1 



... 



... 



... 



... 



... 







... 



... 



July 1 + 



147 



124 



29 



5 



4 



1 



1 



1 



3 



... 



4 



1 







• • 



... 



163 



94 



35 



20 



9 



2 



1 



1 



1 



... 



2 



... 







• • 



... 



Aug. 1 + 



120 



120 



31 



18 



10 



8 



8 



2 



3 



1 



1 



1 







.. 



... 



115 



86 



42 



32 



8 



7 



3 



3 





... 



3 



1 







.. 



... 



Sept. 1 + 



97 



108 



61 



32 



9 



3 



4 



1 



7 



... 



2 



... 







• • 



... 



108 



72 



65 



24 



8 



2 



9 



3 



2 





5 



1 







1 



... 



Oct. 1 + 



123 



93 



46 



24 



8 



5 



3 



2 



1 



1 



3 



... 







.. 



... 



168 



98 



42 



13 



2 



3 



3 



1 



3 



2 



2 



... 







.. 



... 



Nov. 1 + 



120 



78 



43 



19 



7 



8 



4 



2 



3 



... 



4 









.. 



... 



126 



98 



41 



27 



8 



3 



2 



2 



1 



2 



2 









.. 



... 



Dec. 1 + 



147 



110 



37 



19 



5 



4 



5 



1 



3 



1 



... 



1 







.. 



... 



153 



108 



20 



6 



7 



4 



5 



3 



1 



1 



2 



5 







.. 



... 



Year | + 



1601 



1240 



535 



239 



86 



57 



38 



18 



26 



6 



22 



3 







.. 



1 



1652 



1042 



459 



210 



75 



43 



45 



31 



18 



11 



30 



14 



6 



4 



