168 Royal Irish Academy. 



on this subject, and was associated with Sir J. Herschel and others, 

 in the Committee appointed by the British Association to nrge on 

 the Government of the day the importance of establishing magnetic 

 observatories throughout Great Britain and in India. Their arguments, 

 backed by the influence of the E,oyal Society, wrought so effectually 

 on the Government, that the measure was adopted. Such was the 

 universal confidence in Lloyd's skill and experience, that the pre- 

 paration of the written instructions for the conduct of the observato- 

 ries was entrusted to him. How highly the British Association valued 

 his labours may be inferred from the fact that on their visit to Dublin 

 in 1857 he was selected by them as their President. 



In 1877, the most important of his Papers, together with some 

 valuable addresses delivered by him on various public occasions, were 

 reprinted by the late Provost, and given to the world in a collected 

 form — an example which it is highly desii'able should be extensively 

 followed. A complete list of his Papers, published in our Transactions, 

 is here given.* 



"An Attempt to facilitate Observations of Terrestrial Magnetism" (1833). 



" On a iS'ew Case of Interference of the Rays of Light" (1834). 



" On the mutual Action of Permanent Magnets, considered chiefly in reference 

 to their best relative Position in an Observatory " (1839). 



Supplement to a Paper " On the mutual Action of Permanent Magnets, con- 

 sidered chiefly in reference to their best relative position in an Obser- 

 vatory " (1841). 



" On the Determination of the Intensity of the Earth's Magnetic Force in abso- 

 lute measure " (1843). 



•' Eesults of Observations made at the Magnetical Observatory of Dublin 

 diuing the years 1840—43" [1st Series — Magnetical DecHnation] (1846). 



"On the Mean Results of Observations [Magnetical and Meteorological]" 

 (1848). 



" Notes on the Meteorology of Ireland, deduced from the Observations made in 

 the year 1851, under the Direction of the Eoyal Irish Academy " (1853). 



" On the Detennination of the Intensity of the Earth's Magnetic Force in 

 absolute measure, by means of the Dip-Cii-cle" (1858). 



" On the Light reflected and transmitted by Thin Plates " (1859). 



" On Earth- Currents and their Connexion M-ith the Diurnal Changes of the 

 Horizontal Magnetic Needle" (1861). 



" Attempt to deduce the General Laws of the Variations of Temperature at the 

 Earth's Surface from those of Solar and Terrestrial Radiation " (1878). 



* Numerous Papers on the above and kindred subjects are published in the 

 Proceedings of the Academy. 



