The President and Council of the Royal Society adjudged the 
Copley Medal for the year 1831— 
To George Biddell Airy, Esq. M.A. Plumian Professor of Astronomy and 
Experimental Philosophy in the University of Cambridge, for his papers ‘ On 
the Principle of the Construction of the Achromatic Eye-pieces of Telescopes,’ 
—‘ On the Spherical Aberration of the Eye-pieces of Telescopes,’—and for 
other papers on Optical Subjects in the Transactions of the Cambridge Philo¬ 
sophical Society. 
