The Beat Signal-light System

The best night signal lights are those invented by Lieut. Very, of our navy nd named, after him, Very's signáis l'hey consist of a white, a red, and a íreen star, each fired into the air from i pistol, so that by flring one, two, or three of them in quick succession, and In different orders, with a pause between the groups, different letters or iignal numbers can be made until r i?ntence is complete. They can be easLly read from vessels twelve miles awav