Magnetic Declination, 1845. 



TABLE III.- 



-Diurnal Range of Magnetic Declination for each Civil Day, as deduced from the 

 Hourly Observations, vv^ith the Mean for each Week in 1845. 



Civil 

 Day. 



Jan. 



Feb. 



March. 



April. 



Alay. 



June. 



July. 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 



1 



9-71 



6-68 



14-08 



10-34 



21-21 



[15-50] 



14-43 



29-87 



15-44 



13-52 



18-17 



5-18 



2 



10-65 



[10-37] 



[14-69] 



12-99 



9-53 



10 



76 



8 



70 



19-87 



20 



00 



8-50 



[14-92] 



12 



13 



3 



3-81 



7-73 



9-53 



16-86 



12-17 



10 



76 



10 



87 



[17-36] 



19 



74 



15-78 



12-56 



31 



83 



4 



3-74 



11-70 



7-24 



14-23 



[13-36] 



17 



54 



14 



59 



16-88 



15 



20 



8-39 



12-91 



20 



17 



5 



[ 5-57] 



15-54 



6-58 



13-94 



9-93 



13 



22 



9 



87 



10-97 



16 



34 



[10-73] 



23-98 



10 



51 



6 



2-62 



14-84 



7-40 



[14-34] 



1319 



13 



39 



[12 



59] 



13-03 



13 



65 



11-62 



4-87 



8 



80 



7 



7-73 



13-11 



11-36 



13-89 



14-14 



16 



46 



15 



06 



11-42 



[14 



50] 



10-59 



16-27 



[ 9 



51] 



8 



4-89 



5-69 



9-06 



1318 



12-36 



[14 



88] 



14 



76 



21-60 



20 



69 



9-49 



7-18 



6 



86 



9 



37-83 



[ 9-96] 



[ 9-84] 



13-97 



14-56 



19 



31 



10 



39 



18-79 



11 



06 



30-88 



[ 9-76] 



3 



79 



10 



31-14 



13-33 



10-38 



12-34 



11-17 



15 



76 



14 



69 



[14-65] 



10 



05 



26-76 



13-95 



6 



95 



11 



9-86 



6-76 



13-34 



14-95 



[13-22] 



11 



16 



13 



86 



11-63 



16 



42 



9-21 



9-18 



5 



28 



12 



[18-78] 



6-05 



7-48 



15-35 



14-41 



14 



03 



9 



38 



11-44 



13 



36 



[14-94] 



7-11 



6 



67 



13 



9-38 



8-07 



12-24 



[22-48] 



12-71 



12 



28 



[12 



70] 



1303 



14 



90 



6-31 



4-15 



32 



87 



14 



9-82 



5-00 



19-71 



67-37 



14-14 



15 



86 



12 



52 



9-37 



[16 



02] 



6-58 



5-06 



[15 



63] 



15 



14-65 



3-26 



15-38 



15-11 



17-26 



[12 



56] 



13 



60 



19-75 



7 



58 



9-89 



4-63 



27 



56 



16 



5-80 



[ 5-90] 



[16-20] 



9-77 



18-44 



12 



83 



12 



15 



15-49 



13 



89 



9-22 



[11-48] 



12 



79 



17 



6-76 



7-86 



15-59 



10-10 



11-20 



9 



24 



15 



14 



[14-86] 



30 



00 



20-70 



25-30 



8 



61 



18 



6-92 



5-54 



16-25 



18-30 



[15-81] 



11 



14 



13 



99 



18-52 



27 



22 



13-16 



21-02 



15 



49 



19 



[13-70] 



5-67 



18-05 



17-56 



19-31 



14 



16 



16 



15 



13-36 



18 



84 



[19-52] 



8-70 



3 



50 



20 



40-16 



15-26 



19-12 



[14-58] 



15-76 



15 



21 



[14 



14] 



12-65 



13 



29 



22-61 



6-82 



8 



21 



21 



16-35 



22-74 



11-32 



13-44 



12-91 



18 



42 



11 



03 



14-78 



[15 



47] 



36-57 



6-33 



[ 7 



60] 



22 



6-20 



14-81 



14-49 



12-63 



18-07 



[14 



20] 



13 



05 



15-71 



10 



71 



14-85 



9-74 



5 



49 



23 



19-98 



[20-66] 



[18-64] 



15-47 



12-44 



13 



39 



15 



48 



18-49 



9 



08 



5-52 



[ 8-13] 



6 



73 



24 



17-56 



33-12 



20-68 



15-11 



14-38 



13 



88 



12 



02 



[15-63] 



13 



71 



11-69 



10-47 



6 



20 



25 



17-84 



17-84 



26-63 



18-34 



[11-91] 



10 



17 



26 



07 



16-15 



29 



96 



13-26 



8-44 



4 



22 



26 



[19-81] 



20-20 



19-59 



14-90 



8-19 



11 



92 



11 



00 



16-77 



11 



74 



[ 9-69] 



6-98 



5 



01 



27 



18-34 



29-63 



13-88 



[16-51] 



9-01 



13 



86 



[13 



38] 



11-91 



34 



57 



8-20 



9-91 



6 



39 



28 



19-68 



21-06 



22-25 



22-18 



9-38 



18 



28 



9 



06 



12-41 



[19 



25] 



11-27 



1019 



[ 8 



17] 



29 



25-48 





17-51 



14-39 



10-87 



[13 



08] 



10 



90 



3711 



11 



12 



8-23 



10-56 



4 



07 



30 



15-00 





[14-50] 



14-16 



14-40 



11 



29 



11 



23 



22-00 



14 



60 



7-70 



[13-30] 



16 



99 



31 



5-58 





10-02 





28-70 





13-55 



[21-12] 





14-19 





12-36 1 



TABLE IV. — Means of the Diurnal Ranges of Magnetic Declination, w^ith reference to the 



Moon's Age and Declination, for 1845. 











After 





After 





Moon's 



Mean 



Moon's 



Mean 



Moon 



Mean 



Moon 



Mean 



Age. 



Range. 



Age. 



Range. 



farthest 

 North. 



Range. 



farthest 

 North. 



Range. 



Day. 



15 



14-33 



Day. 







12-07 



Day. 

 



13-97 



Day. 

 14 



12-33 



16 



16-75 



1 



14-54 



1 



15-57 



15 



11-07 



17 



15-51 



2 



14-51 



2 



17-90 



16 



1210 



18 



17-29 



3 



12-90 



3 



18-86 



17 



18-82 



19 



16-24 



4 



14-54 



4 



13-88 



18 



15-09 



20 



15-74 



5 



12-78 



5 



16-68 



19 



12-79 



21 



17-28 



6 



13-65 



6 



13-14 



20 



11-32 



22 



12-93 



7 



12-94 



7 



15-62 



21 



11-03 



23 



11-82 



8 



16-92 



8 



15-30 



22 



13-95 



24 



12-54 



9 



12-05 



9 



14-54 



23 



14-15 



25 



12-25 



10 



11-30 



10 



14-52 



24 



10-41 



26 



13-75 



11 



12-11 



11 



13-56 



25 



11-50 



27 



11-37 



12 



13-98 



12 



11-25 



26 



11-94 



28 



12-39 



13 



11-85 



13 



13-08 



27 



12-43 



29 



12-83 



14 



13-31 











