A POWERFUL LIGHT.

Temuka Leader, Issue 707, 8 December 1881, Page 3

A POWERFUL LIGHT.

Some interesting experiments were made in public recently at the wellknown glass works of Messrs Chance Brothers and Company, Smethwick, near Birmingham, with a new l a rjp, which they have just constructed to crown the summit of the South Head Lighthouse, Macquarie Harbor, New South Wales. It is called a first order, dioptric, revolving light, with the electrical arc. The lamp has a special srrangetnen t of prisms for securing

V( rti'cal divergence of the beam. It is ov.-r 6tt in di:umt<n-, and the'height is nbout 9r, and it is said to be the first time'such dimensions have been applied to illumination by the eleettic arc. The lamp or regulator has a power of 12,000 candles in the focus of light, and tinmerging beam has a luminous intensity exceeding 12,000,000 candles. The light will flash around half the horizon at intervals of a minute, and wiP make a complete revolution every sixteen minutes. On an average the light will be visible a distance of forty or fifty miles. The lamp was designed for Messrs Chance by Dr Hopkinson, F.R.S., and is constructed for the Government of New South Wales. Itmakers claim that it will be largest and most powerful light in the world. The experiments were thoroughly successful, and the light being so intense that it it could hardly be endured with the naked eye.—Times.