GENERAL RESULTS OE THE MAKERSTOUN OBSERVATIONS. 



1. The detailed results of the Makerstoun Observations for each of the years 1842, 1843, and 1844, have 

 already been given in the volumes containing the observations for these years ; the detailed Tables of Results 

 for the years 1845 and 1846 are given in pages 1 to 86 of this volume : general conclusions from the whole 

 series of observations from 1841 to 1846, together with those from the monthly mean values till the end of 

 1849, are given in the pages immediately following. 



2. In considering the following investigations, it will be of importance to bear in mind the numbers of Ob- 

 servations made daily, upon which the separate results depend ; these are noted in the following scheme : — 



Year. 



No. 



of Daily Obs. 



1841 and 1842, 





4, 



1843, 





9,* 



1844 and 1845, 





24, 



1846, 





9,* 



1847, 





5, 



1848 and 1849, 





2, 



Intervals and Times of Daily Observations. 



Three hourly, between 20*^ and 5'*, Gbttingen Mean Time, 



Two hourly, between 18'' and 1 0'' 



Hourly, 



Two hourly, between 18'^ and 10'' 



Three hourly, between 20^ and 8*^ 



At 23^ and 5^ 



3. All the monthly means from incomplete diurnal series have been reduced to means from hourly obser- 

 vations ; the corrections having been deduced from the means for the corresponding hours in 1844 and 1845. 



Magnetic Declination. 

 Table 1. — Monthly Means of Magnetic Declination at Makerstoun. 



Month. 



1841. 



1842. 



1843. 



1844. 



1845. 



1846. 



1847. 



1848. 



1849. 



January 



o 



25 27-50 



25 25-50 



25 20-60 



25 14-09 



25 08-95 



25 02-74 



24 55-73 



24 47-90 



February 





30-44 



24-91 



18-93 



13-88 



08-06 



02-54 



54-47 



47-74 



Marcli 





29-54 



24-35 



17-84 



1314 



07-44 



02-60 



54-66 



47-36 



April 





33-40 



23-79 



18-28 



11-34 



06-67 



02-47 



53-67 



46-31 



May 





29-86 



23-51 



17-30 



11-35 



06-02 



25 00-60 



53-16 



46-21 



June 





29-30 



25-25 



16-58 



11-22 



06-12 



24 59-69 



51-43 



45-85 



July 





28-54 



23-59 



16-51 



11-10 



06-08 



59-52 



51-59 



44-14 



August 



25 35-87 



27-02 



22-33 



17-36 



10-65 



05-62 



59-11 



50-56 



43-72 



September 



32-21 



28-04 



20-92 



17-10 



10-37 



05-40 



57-20 



49-11 



42-75 



October 



29-86 



26-89 



21-75 



15-49 



10-76 



04-54 



56-62 



49-26 



43-30 



Noyember 



31-09 



26-19 



19-09 



14-47 



09-57 



03-68 



56-81 



48-83 



43-56 



December 



1 



24-64 



19-20 



14-21 



08-34 



03-08 



55-91 



49-24 





* In the months of November and December 1843, an observation was made at SS^" Gottingen Mean Time. In 1846, 12 Obser- 

 vations were made daily ; the intermediate observations (at 23'>, 1^, and 7^, Gottingen Mean Time) are employed for the diurnal 

 period and ranges only. 



MAG. AND MET. OBS. 1845 AND 1846. C 



