Papers on the Comparative Merits of the Catoptric and Dioptric or Catadioptric Systems of Light-House illumination

Papers on the Comparative Merits of the Catoptric and Dioptric or Catadioptric Systems of Light-House illumination - And Other Subjects Relating to Aids to Navigation is an unchanged, high-quality reprint of the original edition of 1861.
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