24 



Results of Makeestoun Observations, 1845. 



TABLE XLIII. — Mean Difference of a Single Observation of the Balance Magnetometer from the 

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



Mak. 

 M. T. 



Jan. 



Feb. 



March. 



April. 



May. 



June. 



July. 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 



Year. 



h. 



Mic. Div. 



Mic. Div. 



Mic. Div. 



Mic. Div. 



Mic. Div. 



Mic. Div. 



Mic. Div. 



Mic. Div. 



Mic. Div. 



Mic. Div. 



Mic. Div. 



Mic. Div. 



Mic. Div. 



12 



25-3 



26-5 



23-4 



49-4 



22-5 



9.2 



141 



243 



18 



8 



181 



13. 1 



181 



21-9 



13 



23-3 



24-3 



30-1 



36-1 



35-9 



9-5 



160 



24.5 



25 



7 



18-3 



141 



15-8 



22-8 



14 



36-3 



22-6 



31-5 



44-2 



36-8 



9-7 



20-8 



25.5 



25 







191 



17-7 



15.2 



25-4 



15 



30-3 



19-5 



32-8 



25-9 



42-1 



100 



23-3 



28.2 



28 



8 



17-4 



17-8 



16.8 



24-4 



16 



26-5 



18-2 



24-0 



31-5 



27-7 



10-6 



221 



25-1 



27 



8 



15.8 



16-5 



161 



21-8 



17 



21-8 



18-4 



17-9 



18-7 



20-7 



11-7 



22-0 



20-7 



29 







139 



16-3 



17-8 



191 



18 



19-7 



17-7 



11-2 



10-9 



16-7 



11-3 



18-4 



I6.7 



27 



1 



12-5 



16-9 



17-3 



I6.4 



19 



18-3 



15-1 



8-4 



12-3 



15-2 



11.4 



15-2 



15.7 



22 



1 



116 



167 



161 



14-8 



20 



18-1 



13-4 



7-4 



123 



13-7 



11-7 



12-7 



14.5 



22 



2 



9-9 



165 



160 



140 



21 



17-0 



111 



7-2 



12-5 



15-5 



10-9 



11-6 



13-8 



18 



1 



10-9 



15-4 



15-8 



13-3 



22 



14-5 



10-8 



7-4 



12-4 



151 



10-4 



10.4 



11-5 



15 







10-8 



15.1 



157 



12-4 



23 



11-2 



10-7 



71 



9-7 



13-7 



10.1 



9-5 



10-5 



13 







9.4 



13.4 



15-4 



11. 1 







11.4 



10-7 



7-5 



9-8 



13-8 



9-2 



9-8 



10-4 



13 



3 



101 



12-4 



15.7 



11-2 



1 



11-8 



10-9 



7-7 



116 



13-9 



100 



9.4 



119 



19 



9 



10-5 



13-1 



15-6 



122 



2 



12-7 



11-6 



7-2 



10-8 



13-3 



11-6 



11. 1 



12-6 



23 



3 



110 



14-8 



I6.5 



130 



3 



14-9 



15-8 



8-8 



150 



13. 2 



130 



10.9 



126 



23 



3 



13.5 



18-2 



28.0 



15.6 



4 



14-9 



14-3 



12-4 



13-6 



12-7 



15.7 



129 



16.6 



21 



8 



171 



20-9 



31.8 



171 



5 



15-1 



19-6 



28-1 



14-6 



13.4 



16.0 



13.6 



I8.7 



31 



5 



18.2 



22.5 



39-4 



20-9 



6 



16-8 



171 



24-8 



15-7 



14.0 



14-8 



131 



14-8 



19 



4 



163 



260 



39.7 



19.4 



7 



17-1 



10-5 



16-6 



12-9 



11-3 



15-1 



12.2 



10.8 



17 



2 



15-3 



230 



35-6 



165 



8 



16-5 



9-7 



12-6 



9-3 



91 



13-9 



10-5 



71 



14 



5 



13-9 



19-9 



21-6 



13-2 



9 



15-5 



13-7 



IM 



6-6 



7.8 



11-9 



10-4 



18-3 



11 



2 



122 



161 



21-9 



131 



10 



24-2 



14-3 



14-2 



111 



7-9 



10.9 



9.8 



13-5 



16 







10-5 



13.4 



I8.4 



137 



11 



26-7 



19-3 



14-0 



13-9 



11.5 



117 



9.2 



23.5 



19 



6 



17.8 



133 



18-4 



16-6 



Variations of Magnetic Dip. 



TABLE XLIV. — Variations of Magnetic Dip, with reference to the Moon's Age, Declination, and 

 Distance from the Earth, as deduced from Tables XIX. and XXXII. 





Variations 





Variations 



After 



Variations 



After 



Variations 



Before 



Variations 



Before 



Variations 



Moon's 



of • 



Moon's 



of 



Moon 



of 



Moon 



of 



and 



of 



and 



of 



Age. 



Magnetic 



Age. 



Magnetic 



farthest 



Magnetic 



farthest 



Magnetic 



after 



Magnetic 



after 



Magnetic 





Dip. 





Dip. 



North. 



Dip. 



North. 



Dip. 



Perigee. 



Dip. 



Apogee. 



Dip. 



Day. 



' 



Day. 



' 



Day. 



1 



Day. 



> 



Day. 



' 



Day. 



' 



15 



0.215 







0.144 







0-114 



14 



0056 



7 



0-287 



7 



0-106 



16 



0-219 



1 



0-228 



1 



0.110 



15 



0-010 



6 



0-166 



6 



0-270 



17 



0-219 



2 



0-402 



2 



0.068 



16 



0032 



5 



0-235 



5 



0-087 



18 



0.313 



3 



0-246 



3 



0-178 



17 



0-300 



4 



0-160 



4 



0-100 



19 



0-318 



4 



0-175 



4 



0-139 



18 



0.594 



3 



0-287 



3 



0-192 



20 



0-295 



5 



0-413 



5 



0-265 



19 



0-267 



2 



0-231 



2 



0-076 



21 



0-337 



6 



0-260 



6 



0-318 



20 



0-187 



1 



0-069 



1 



0-171 



22 



0-254 



7 



0-229 



7 



0-379 



21 



0-191 



P 



0000 



A 



0-059 



23 



0-171 



8 



0-451 



8 



0-342 



22 



0.128 



1 



0-100 



1 



0.154 



24 



0.259 



9 



0-189 



9 



0-263 



23 



0.104 



2 



0-445 



2 



0.267 



25 



0.228 



10 



0091 



10 



0-234 



24 



0-091 



3 



0-567 



3 



0-166 



26 



0-000 



11 



0.103 



11 



0-162 



25 



0-036 



4 



0-288 



4 



0-069 



27 



0-028 



12 



0-110 



12 



0-209 



26 



0-000 



5 



0-167 



5 



0-296 



28 



0-018 



13 



0-092 



13 



0-218 



27 



0-056 



6 



0-199 



6 



0-215 



29 



0.052 



14 



0-104 











7 



0-188 



7 



0-192 



^L 



