1878.] of Astronomical Tables. ' 155 



pas ISO*^ : d'y ajouter, si elle excede ISO*^. Voici quelle est 

 cette table. 



So clear an explanation of the word needs no comment : it 

 is merely an abbreviated compound of Prosthesis and Aphceresis ; 

 and corresponds to the modern alternative sign (+). 



March 11, 1878. 



Professor Liveing, President, in the chair. 



A communication was read from Mr R. Moon, commenting on 

 a recent paper by Prof Clerk-Maxwell, " On a paradox in the 

 theory of attraction " (March 12, 1877). 



A communication was read by 



Professor Cayley, " On a theorem of Abel's relating to a 

 quintic equation." 



The theorem in question is given, CEuvres t. II. p. 253, as 

 an extract from a letter to Crelle dated 14th March, 1826, as 

 follows : 



