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Preface; 1. Lighthouse construction; 2. Lighthouse illumination adapted to the illumination of every azimuth, or of certain azimuths only, by light of equal power, acting either constantly or periodically; 3. Azimuthal condensing system for distributing the light unequally in different directions either constantly or periodically; 4. Distinctive characteristics of lights; 5. The illumination of beacons and buoys; 6. The electric light; 7. Statistics of lighthouse apparatus; 8. Sources of illumination; 9. Miscellaneous subjects connected with lighthouses; 10. Fog-signals; Appendix; Index.