Letters of Euler on Different Subjects in Natural Philosophy

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Independently of the great popularity Of this work, it possesses a particular interest at the present time, in consequence of its containing a popular view Of the doctrine, that light consists in the undulations of an ethereal medium, which is now generally adopted, in consequence of recent discoveries in optics.