iv PREFACE. 
observer, and Mr ALEXANDER Hoae, an ingenious mechanic who had been engaged 
in the construction of the Observatory (which was performed chiefly under his 
superintendence), and who had been afterwards employed as an observer on Term 
days, was in consequence appointed in the end of 1843. 
In 1844 and 1845, a series of observations of all the magnetical and meteoro- 
logical instruments was made hourly except on Sundays. It was originally pro- 
posed that this hourly series should extend through only two years; in 1846, 
therefore, the same system was adopted as in 1843. A more limited series of ob- 
servations was made in the years 1847, 1848, and 1849. 
After 1845 the ordinary observations at Makerstoun were chiefly made by 
Messrs WetsH and Hoae. The latter continued the observations in 1849, and 
thereafter, in accordance with instructions left by Mr Broun for his use, who also 
examined the Observatory in 1851. 
In the autumn of 1849 Messrs Broun and Wetsx left Makerstoun for Edin- 
burgh, where the former continued the preparation of the last volume of the Maker- 
stoun Results* for the press, Mr WELSH aiding in the reductions and preparations 
of tables ; and with this work they were occupied till the spring of 1850. 
In that volume the observations were fully discussed until the beginning of 
1847, while certain results were obtained extending to November 1849. 
It is the observations from 1847 to 1855 that are chiefly discussed in this 
Appendix ; while, at the same time, certain general conclusions are drawn from 
the whole series of observations. 
From 1849 Mr Hoe was almost entirely responsible for the accuracy of the 
observations—a duty for which his experience and fidelity rendered him well 
qualified. Mr Broun and Mr Wetsu occasionally inspected the instruments. 
The former left England for India in November 1851. Mr Wetsu had already, in 
1850, been appointed to the charge of the Kew Observatory, and continued, so far 
as his other duties permitted, to take an interest in the Makerstoun Observations, 
and aided the Editor of this Appendix with his valuable advice down to the period 
of his premature decease in May 1859. 
* Edin. Trans., Vol. XIX. 
