ELEMENTARY TREATISE 



ON THE 



WAVE-THEORY OF LIGHT. 



BY 



HUMPHREY LLOYD, D.D., D.C.L.; 



PROVOST OF TRINITY COLLEGE, DUBLIN, 

 AND FORMERLY PROFESSOR OF NATURAL PHILOSOPHY IN THE UNIVERSITY. 



irb Cbition, JUbiseb twb 



il V.I ft SI TT1 



CONDON: 

 ONGMANS, GREEN, AND CO 



1873- 



