Magnetic Declination. 



335 



TABLE III. — Diurnal Range of Magnetic Declination for each Civil Day, as deduced from the Hourly 

 Observations, with the Mean for each Week in 1844. 



Civil 

 Day. 



Jan. 



Feb. 



March. 



April. 



May. 



June. 



July. 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 



1 



10-88 



2103 



605 



11-61 



15-67 



14-32 



12-78 



19-12 



[15-02] 



44-72 



14-19 



[12-61] 



2 



12-10 



7-46 



20-24 



16-22 



11-26 



[10-91] 



13-51 



19-85 



11-57 



19-65 



16-45 



12 



07 



3 



5-00 



11-42 



[19-72] 



14-70 



18-72 



9-67 



10-83 



17-69 



1209 



14-32 



[11-76] 



4 



53 



4 



4-20 



[14-91] 



26-09 



12-26 



8-43 



8-41 



13-81 



[14-15] 



11-42 



11-83 



17-07 



22 



76 



5 



18-71 



14-39 



22-80 



15-28 



[12-84] 



11-93 



10-94 



9-04 



10-16 



12-36 



6-75 



10 



04 



6 



23-80 



11-98 



24-07 



29-21 



13-39 



12-49 



12-48 



9-12 



7-56 



[11-69] 



6-14 



4 



71 



7 



[12-65] 



23-21 



27-29 



[15-52] 



9-52 



12-99 



[11-48] 



1009 



11-21 



11-06 



8-22 



5 



92 



8 



10-81 



14-26 



27-22 



11-73 



15-72 



11-65 



15-97 



12-11 



[10-66] 



12-41 



8-58 



[ 6 



67] 



9 



8-89 



8-39 



23-15 



9-87 



15-20 



[11-79] 



6-89 



16-27 



14-86 



8-75 



6-88 



3 



54 



10 



9-49 



14-91 



[18-10] 



14-75 



8-46 



11-33 



8-78 



13-67 



9-54 



7-04 



[11-68] 



8 



20 



11 



7-16 



[ 8-88] 



10-18 



15-82 



10-62 



10-78 



9-99 



[13-00] 



10-64 



6-73 



17-02 



7 



60 



12 



10-29 



7-45 



11-27 



9-68 



[13-92] 



11-53 



8-63 



11-57 



11-50 



8-50 



18-60 



3 



55 



13 



5-33 



5-20 



9-48 



10-49 



10-05 



13-56 



12-19 



14-28 



12-92 



[ 8-71] 



10-76 



4 



14 



14 



[ 7-05] 



3-10 



6-91 



[15-96] 



17-48 



12-48 



[12-08] 



10-10 



17-53 



11-21 



12-17 



10 



84 



15 



5-54 



8-52 



8-76 



12-79 



21-72 



10-56 



14-18 



9-64 



[14-18] 



9-42 



6-03 



[ 7 



60] 



16 



6-45 



6-84 



9-22 



8-61 



10-83 



[13-56] 



13-58 



19-72 



10-82 



9-39 



63-80 



13 



52 



17 



7-54 



13-18 



[11-35] 



38-39 



901 



17-96 



13-89 



14-41 



17-38 



10-89 



[20-86] 



4 



91 



18 



13-61 



[ 7-06] 



17-06 



16-36 



9-40 



14 16 



18-65 



[12-70] 



14-95 



14-28 



20-12 



8 



65 



19 



3-73 



3-36 



16-85 



8-81 



[12-75] 



12-62 



12-54 



11-28 



19-72 



7-71 



14-33 



19 



49 



20 



6-50 



4-89 



9-32 



10-50 



8-41 



10-46 



12-28 



9-88 



28-71 



[15-80] 



8-72 



32 



83 



21 



[ 6-68] 



5-56 



8-79 



[11-41] 



20-72 



19-77 



[12-08] 



11-26 



12-23 



30-65 



5-65 



20 



23 



22 



515 



8-09 



12-04 



10-54 



1814 



9-46 



7-93 



17-57 



[18-47] 



17-51 



41-83 



[14 



87] 



23 



7-87 



7-01 



9-53 



11-26 



27-58 



[12-47] 



10-48 



15-42 



11-96 



13-77 



47-36 



6 



66 



24 



3-21 



4-57 



[ 9-46] 



10-97 



8-68 



9-26 



10-60 



14-44 



11-59 



13-22 



[20-28] 



4 



84 



25 



16-66 



[ 8-81] 



9-91 



42-78 



17-02 



12-53 



19-49 



[14-07] 



26-59 



43-95 



9-32 



5 



18 



26 



7-63 



7-70 



8-44 



22-67 



[15-01] 



13-37 



9-39 



12-46 



27-28 



33-49 



4-27 



6 



09 



27 



5-08 



7-27 



8-07 



18-63 



12-53 



9-78 



17-01 



1205 



20-99 



[21-90] 



13-23 



9 



31 



28 



[ 9-47] 



18-21 



14-93 



[21-43] 



12-78 



10-55 



[13-80] 



12-47 



17-58 



13-33 



18-76 



13 



32 



29 



5-88 



1906 



34-10 



15-38 



11-48 



18-53 



11-94 



16-58 



[24-98] 



15-99 



12-96 



[14 



52] 



30 



8-33 





39-53 



13-48 



9-48 



[12-66] 



10-41 



22-75 



19-64 



11-42 



4-56 



32 



35 



31 



13-26 





[21-85] 





11-66 





14-59 



15-69 





9-95 





16-37 



TABLE IV. — Means of the Diurnal Ranges of Magnetic Declination with reference to the Moon' 



Age, Declination, and Distance, for 1844. 











After 





After 





Before 





Before 





Moon's 



Mean 



Moon's 



Mean 



Moon 



Mean 



Moon 



Mean 



and 



Mean 



and 



Mean 



Age. 



Range. 



Age. 



Range. 



farthest 

 North. 



Range. 



farthest 

 North. 



Range. 



after 

 Perigee. 



Range. 



after 

 Apogee. 



Range. 



Dav. 



> 



Day. 



' 



Day. 



' 



Day. 



> 



Day, 



> 



Day. 



' 



15 



15-59 







12-21 







10-43 



14 



11-61 



7 



15-84 



7 



13-92 



16 



16-28 



1 



11-69 



1 



11-35 



15 



12-51 



6 



12-57 



6 



12-78 



17 



15-82 



2 



11-89 



2 



15-22 



16 



9-89 



5 



16-46 



5 



13-48 



18 



15-96 



3 



10-32 



3 



13-36 



17 



15-20 



4 



12-87 



4 



15-70 



19 



18-76 



4 



11-03 



4 



17-85 



18 



12-25 



3 



12-08 



3 



16-50 



20 



13-06 



5 



11-28 



5 



15-47 



19 



12-79 



2 



12-68 



2 



19-33 



21 



12-46 



6 



16-52 



6 



15-14 



20 



14-24 



1 



12-72 



1 



13-27 



22 



1205 



7 



12-17 



7 



12-69 



21 



13-32 



P 



11-36 



A 



12-26 



23 



9-89 



8 



14-98 



8 



14-51 



22 



11-92 



1 



15-80 



1 



1017 



24 



11-97 



9 



12-67 



9 



13-06 



23 



19-93 



2 



13-29 



2 



1000 



25 



9-86 



10 



16-23 



10 



11-26 



24 



18-45 



3 



12-40 



3 



11-45 



26 



9-16 



11 



16-40 



11 



11-69 



25 



12-99 



4 



10-80 



4 



12-61 



27 



10-73 



12 



17-76 



12 



13-54 



26 



1307 



5 



14-71 



4 



14-06 



28 



10-77 



13 



19-38 



13 



12-04 



27 



11-87 



6 



12-87 



6 



16-44 



29 



10-69 



14 



16-78 











7 



13-81 



7 



16-18 



This table has been formed from Table III. in the manner described for Table II. 



