PROCEEDINGS 
OF 
THE ROYAL IRISH ACADEMY. 
1846. No. 54. 
May 25. 
REV. HUMPHREY LLOYD, D.D., President, in the 
Chair. 
It was resolved, on the recommendation of Council, that 
a subscription be opened for the purchase of the Domnach 
Airgid, and that the Academy do subscribe fifty pounds. 
The President resumed and concluded the reading of his 
paper ‘‘ On the Variations of the Magnetic Declination.” 
The observations at stated hours, in the Magnetical Ob- 
servatory of Dublin, commenced November 1, 1838, the 
hours of observation being at first limited to the day. In the 
beginning of the year 1840, the observations were taken every 
alternate hour, night and day, according to the more compre- 
hensive scheme which received the sanction of the Royal 
Society, and which, under the recommendation of that body, 
has been followed in more than thirty observing stations 
seattered over the whole globe. This plan has been in ope- 
ration at the Dublin Observatory until January 1, 1844, 
when it was discontinued, four years’ observations having 
been found fully sufficient for the determination of all the 
