THE 



SCIENTIFIC PROCEEDINGS 



OF THE 



ROYAL DUBLIN SOCIETY. 



Yol. XV. (U.S.), No. 19. FEBRUARY, 1917. 



AWARD OF THE BOYLE MEDAL (n 



AUG J 3 \<? 



PROFESSOR HENRY HORATIO DIXON, Sc.D., F.R.S., 



1916. 



DUBLIN: 



PUBLISHED BY THE EOYAL DUBLIN SOCIETY, 



LEINSTER HOUSE, DUBLIN. 



WILLIAMS AND NORGATE, 



14, HENRIETTA STREET, COVENT GARDEN, LONDON, W.C. 



1917. 



Price Sixpence. 



