COLLATERAL READINGS SUGGESTED: 



Tyndall's Lectures on Light, and Light and Electricity ; Stokes's 

 Burnett Lectures on Light ; Articles Light and Optics in Encyclopae- 

 dia Britannica and American Cyclopaedia ; Whewell's History of the 

 Inductive Sciences ; Lommel's The Nature of Light ; Thomas's Re- 

 vised Theory of Light ; Brewster's Optics ; Bailey's Paradoxes of Vis- 

 ion ; Leibnitz's Letters on Light. 



