Sir David Salomons, Bart., was born in England, in 1851. He was educated for a short period at University College, London, and afterwards at Caius College, Cambridge, where he was graduated with natural science honors. He is a member of the Institution of Electrical Engineers, where he took leading part for many years on the Council, and served in the positions of honorary treasurer and vice-president. He is a fellow of the Royal Astronomical Society, of the Physical Society of London, and of the Royal Microscopical Society, and an associate of the Institution of Civil Engineers. [Illustration: SIR DAVID SALOMONS] Sir David was one of the first in England to adopt the electric light. This was about the year 1874, when he found it necessary to make the lamps, switches and other apparatus himself, as those were unobtainable at the time; much of the apparatus in general use to-day has been copied from his models. About 1874-5, he constructed a small electrical road carriage, which was in use a short time only, owing to the trouble of re-charging batteries, as no accumulators existed at that period. Devoting himself largely to scientific investigation he is the author of various works on scientific subjects, such as photographic optical formulæ, photography and electrical subjects, his chief work being his three-volume Electric Light Installations, now entering its ninth edition. Of this work, the first volume on Accumulators was for a great many years the only practical work on the subject. He is also the author of many papers read before scientific societies, including the Royal Society and Royal Institution. He is an original member of the Automobile Club of France and of the Automobile Club of Great Britain, being a member of the committee of the former and member of committee and a vice-president of the latter, and is also an ordinary or honorary member of most of the Continental automobile clubs. He was Mayor of Tunbridge Wells, 1894-5, and High Sheriff of Kent in 1881, and is a Magistrate for Kent, Sussex, Middlesex, Westminster and London.