GENERAL RESULTS OF 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. Intervals and Times of Daily Observations. 
1841 and 1842, 4, Three hourly, between 204 and 5", Gottingen Mean Time, 
1843, oO Two hourly, between 18h and 10 o.oo... eee eee cece eee 
1844 and 1845, 24, Honrliyjace) gh Gee) tot Aaihersens bee Shea eb oon 
1846, 9,* Two hourly, between 185 and 10" 000... oo. eee eceeeee eee 
1847, 5, Three hourly, between 208 and 89 o.oo... soe. eee eee eee rete 
1848 and 1849, 2, ANG OBIE ENGGI GI a BP ae aanilciaah Manali eM an orp tatnebiee A eit 
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. 
1843, 1844, 1845. 1846. 1847. 
<0 ’ ° , ’ 
January 50/25 25-50 |25 20-60 |25 14-09 |25 08-95 |25 02-74 |24 55-73 
February |] seeeee E 24-91 18-93 13-88 08-06 02-54 54-47 
March - 24-35 17-84 13-14 07-44 02-60 54-66 
April . 23-79 18.28 11-34 06-67 02-47 53-67 
May E 23-51 17-30 11-35 06-02 00-60 53-16 
June . 25-25 16-58 11-22 06-12 59-69 51-43 
July * 23-59 16-51 11-10 06-08 59-52 51-59 
August 25 35-87 . 22-33 17-36 10-65 05-62 59-11 50-56 
September 32-21 . 20-92 17-10 10-37 05-40 57-20 49-11 
October 29-86 D 21-75 15.49 10-76 04-54 56-62 49-26 
November D 19-09 14-47 09-57 03-68 56-81 48-83 
December “ 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 234 Gottingen Mean Time. In 1846, 12 Obser- 
vations were made daily ; the intermediate observations (at 234, 14, and 74, Gottingen Mean Time) are employed for the diurnal 
period and ranges only. 
MAG. AND MET. OBS. 1845 anp 1846. c 
