XXV 



tories were erected in various parts of the world. The high apprecia- 

 tion formed of Dr. Lloyd's scientific ability was proved by the fact that 

 the duty of drawing up instructions for the observers at these several 

 stations was intrusted to him. It was also provided that he should 

 receive directly from the stations the reports of the observers. As a 

 further proof of Dr. Lloyd's high reputation in this branch of science, 

 it may be mentioned that the Director of the Magnetic Observatory 

 at Cadiz visited Dublin for the purpose of consulting him as to the 

 best methods of observing. 



In the year 1837, Dr. Lloyd had induced the Board of Trinity 

 College to commence the erection of a Magnetic Observatory within 

 the precincts of the College. This observatory was completed in the 

 year 1838, and observations were regularly carried on under his per- 

 sonal superintendence for several years. The instruments used in this 

 observatory were constructed under the direction of Dr. Lloyd, and 

 were in large part devised or greatly modified by him. Instruments 

 similar in their construction to those used in the Dublin Observatory 

 were subsequently employed in other observatories throughout the 

 world. The observations made in Dublin were published in two 

 quarto volumes in the year 1869. They form an important part of 

 the great series of magnetic observations begun by an individual in 

 Scotland — passing thence into the hands of a Society, and by them 

 extended throughout the British Isles — taken up finally by the nation 

 and extended over the world. No nation ever engaged in a more 

 important scientific enterprise ; no individual held a more prominent 

 place in that enterprise than Dr. Lloyd. 



Besides his share in this great public work, Dr. Lloyd was con- 

 tinually and actively engaged in his individual researches, the results 

 of which were from time to time given to the world, generally in the 

 " Transactions " or "Proceedings " of the Royal Irish Academy. Among 

 these may be noticed a memoir " On the Mutual Action of Two Per- 

 manent Magnets," readbefore the Academy in February, 1839. The 

 importance of this communication in its bearing on the question of 

 terrestrial magnetism, was recognised by the Committee in their 

 "Report to the British Association," in 1841. Besides optics and 

 magnetism, Dr. Lloyd communicated to the Royal Irish Academy, 

 from time to time, valuable papers on meteorology. In the year 

 1877, he published in a collected form, under the title "Miscellaneous 

 Papers connected with Physical Science," his principal contributions to 

 the Transactions of the British Association, and of the Royal Irish 

 Academy. He also published in 1874, a systematic treatise on 

 "Magnetism, General and Terrestrial." The third edition of his 

 treatise on the " Wave Theory of Light " was published in 1873. 



As head of the University of Dublin, Dr. Lloyd won golden 

 opinions from all those who came into relation with him. His policy 



