INTRODUCTION, 



Position and Description of the Observatory. 



1. The Magnetical and Meteorological Observatory at Makerstoun, in Rox- 

 burghshire, was erected by General Sir Thomas Makdougall Brisbane, Bart., in 

 the year 1841. The geographical co-ordinates are as follow : — 



Latitude, 55" 34' 45" N.* 



Longitude, 0"^ 10™ 3-5^ W. of Greenwich.! 



Height of the barometer cistern above mean water at Berwick, 213 feet.j 



2. The Magnetical Observatory is situate nearly on the summit of a ridge, which 

 occupies the left or northern bank of the Tweed, being 540 feet distant from, and 

 80 feet above, that river. The Astronomical Observatory is upon the highest part 

 of the ridge, 140 feet due west of the Magnetic Observatory. A fair horizon is seen 

 from the Observatory hill, being bounded about 10 miles to the east by a slightly- 

 swelling ground, which, to the east-south-east, seems to join the Cheviot Hills. The 

 view is bounded about a mile to south and. south-west by a ridge, forming the right 

 bank of the Tweed ; about 500 feet to the south-west and north-west by masses of 

 trees in the Makerstoun grounds ; § and from 1 to 3 miles to north-west, north, and 



* Ast. Nach., vol. x., p. 214. 



f Deduced from the longitude of the Astronomical Ohservatory, Mem. Roy. Ast. Soc, vol. xi.,p. 17L 



I Obtained from levels for a railway, and from barometric comparisons. — See Makerstoun Ob- 

 servations for 1843, Introduction, p. ix. 



§ The above view, taken from a point about fifty yards to the NE. of the Magnetic Observatory, 

 shews the trees in the grounds at their most unfavourable elevation. 



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



