16 



Results of Makerstoun Observations, 1845. 



TABLE XXVIII. — Mean Difference of a Single Observation of the Bifilar Magnetometer from 

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



Civil 

 Day. 



Jan. 



Feb. 



March. 



April. 



May. 



June. 



July. 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 





Sc. Div. 



Sc. Div. 



Sc. Div. 



Sc. Div. 



Sc. Div. 



Sc. Div. 



Sc. Div. 



Sc. Div. 



Sc.Div. 



Sc. Div. 



Sc. Div. 



Sc. Div. 



1 



4-12 



1-97 



2-12 



1-92 



6-86 



[4-15] 



4-23 



5-14 



4-31 



2-49 



7-55 



204 



2 



2-81 



[2-97] 



[2-89] 



3-39 



4-43 



3-55 



3-30 



3-49 



607 



2-58 



[4-54] 



2-43 



3 



2-09 



1-78 



2-29 



3-71 



3-68 



2-81 



1-34 



[4-28] 



3-45 



319 



3-28 



24-36 



4 



2-88 



2-32 



2-90 



5-39 



[3-71] 



500 



2-37 



6-92 



5-61 



1-66 



3-86 



17-03 



5 



[3-92] 



3-78 



2-90 



2-42 



2-24 



2-99 



3-50 



3-56 



3-23 



[2-66] 



4-22 



6-06 



6 



4-52 



4-73 



2-72 



[3-60] 



2-20 



2-87 



[2-69] 



3-70 



2-85 



3-92 



1-99 



3-84 



7 



6-04 



2-44 



4-00 



3-06 



2-83 



2-75 



3-67 



2-20 



[3-97] 



2-39 



4-30 



[5-90] 



8 



520 



1-59 



2-99 



3- 13 



166 



[3-02] 



2-48 



4-16 



4-81 



2-20 



1-59 



2-65 



9 



14-28 



[2-67] 



[2-70] 



3-87 



2-55 



3-08 



2-77 



2-95 



4-31 



5-86 



[2-32] 



252 



10 



11-05 



2-42 



2-17 



4-46 



2-48 



4-32 



1-54 



[3-18] 



3-03 



7-63 



1-88 



3-28 



11 



1-72 



1-81 



1-87 



3-51 



[2-88] 



210 



2-22 



2-28 



3-63 



3-35 



1-91 



3-32 



12 



[6-36] 



3-04 



2-44 



4-75 



3-29 



3-95 



3-10 



2-67 



4-03 



[3-87] 



2-28 



3-09 



13 



3-20 



307 



2-90 



[6-84] 



3-34 



4-60 



[2-55] 



4-85 



3-50 



1-85 



2-65 



6-14 



14 



4-19 



2-32 



4-86 



22-47 



3-98 



2-99 



2-87 



3-44 



[3-33] 



212 



2-98 



[3-98] 



15 



3-70 



2-65 



2-99 



307 



3-90 



[3-19] 



2-63 



5-45 



1-72 



2-42 



3-45 



5-64 



16 



2-36 



[3-00] 



[3-52] 



2-81 



5-20 



2-13 



2-93 



3-33 



3-81 



2-43 



[4-11] 



2-38 



17 



4-21 



4-19 



3-55 



2-35 



3-67 



2-76 



205 



[3-88] 



3-30 



3-22 



7-65 



3-29 



18 



3-93 



' 2-52 



2-92 



4-55 



[4-00] 



2-74 



2-75 



4-84 



5-43 



3-85 



4-97 



2-98 



19 



[5-11] 



3-25 



3-90 



5-53 



5-43 



1-75 



3-35 



2-92 



415 



[4-08] 



2-98 



2-41 



20 



11-75 



7-02 



5-11 



[3-94] 



3-20 



3-14 



[2-80] 



3-32 



3-46 



3-87 



1-68 



302 



21 



2-76 



4-80 



2-64 



5-00 



2-60 



1-71 



3-00 



2-91 



[4-65] 



6-32 



262 



[3-63] 



22 



5-63 



3-89 



2-43 



3-47 



3-82 



[2-30] 



1-87 



3-20 



2-05 



4-80 



1-98 



4-50 



23 



4-52 



[6-22] 



[4-50] 



2-75 



2-47 



2-71 



3-81 



3-85 



4-36 



1-00 



[3-18] 



5-30 



24 



5-47 



8-52 



4-94 



4-65 



3-86 



2-01 



5-43 



[3-74] 



8-27 



2-71 



1-97 



3-57 



25 



4-23 



7-06 



7-39 



3-91 



[3-30] 



2-48 



10-76 



3-36 



9-50 



3-86 



5-26 



4-46 



26 



[5-03] 



6-04 



4-52 



3-50 



2-38 



2-59 



3-75 



5-50 



503 



[2-78] 



5-59 



4-58 



27 



4-84 



3-55 



5-90 



[4-86] 



303 



3-03 



[4-60] 



3-63 



6-12 



2-38 



5-33 



4-27 



28 



5-61 



3-59 



2-52 



7-86 



4-24 



3-66 



2-60 



2-48 



[5-08] 



4-40 



3-59 



[4-13] 



29 



5-50 





311 



5-17 



4-03 



[3-41] 



2-67 



8-27 



3-97 



2-35 



3-84 



312 



30 



4-06 





[3-23] 



4-07 



4-80 



3-63 



2-37 



8-75 



3-40 



4-29 



[6-93] 



5-90 



31 



3-90 





2-57 





4-74 





2-87 



[5-55] 





4-07 





2-43 



TABLE XXIX. — Mean Difference of a Single Observation of the Bifilar Magnetometer 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. 



Difference. 



Age. 



Difference. 



farthest 

 North. 



Difference. 



farthest 

 North. 



Difference. 



Day. 



Sc. Div. 



Day. 



Sc. Div. 



Day. 



Sc. Div. 



Dav. 



Sc.Div. 



15 



3-61 







3-61 







3-30 



14 



3-78 



16 



3-44 



1 



4-86 



1 



4-21 



15 



308 



17 



4-03 



2 



3-74 



2 



409 



16 



3-32 



18 



4-48 



3 



3-11 



3 



5-88 



17 



6-20 



19 



4-09 



4 



4-96 



4 



401 



18 



5-36 



20 



4-28 



5 



4-44 



5 



4-37 



19 



3-62 



21 



4-78 



6 



3-61 



6 



3-54 



20 



3-50 



22 



3-98 



7 



3-51 



7 



4-74 



21 



3-37 



23 



405 



8 



5-41 



8 



4-09 



22 



3-24 



24 



3-72 



9 



3-37 



9 



4-37 



23 



3-71 



25 



3-41 



10 



3-38 



10 



4-24 



24 



307 



26 



4-04 



11 



3-37 



11 



3-42 



25 



3-36 



27 



4-31 



12 



4-14 



12 



3-29 



26 



3-71 



28 



3-64 



13 



3-21 



13 



3-53 



27 



3-61 



29 



3-76 



14 



3-63 











