3-011-497 - The Print Collector/Heritage Images

The International Exhibition: ventilating globe lights by Messrs. Rickett and Hammond, 1862. 'Its application is twofold - first, as an ordinary pendant for illumination simply...producing a powerful, steady, and shadowless light; secondly, as a ventilating globe light, combining all the advantages derived in the first with a most efficient system of ventilation, conveying away every product of the combustion of the gas itself; establishing a healthy, gentle current for the removal of heated and vitiated air...and greatly assisting to maintain a cool and equable temperature. The importance of such result is manifest in places of public assembly, where large numbers of people are dependent upon a limited supply of air, needing constant renewal; in picture-galleries, where valuable works of art are to be well lit and yet protected against any risk of damage; in libraries, whore costly bindings require a similar care; and in conservatories, where delicate plants are peculiarly sensitive to any impurities of the atmosphere...A: the tube for carrying off the products of combustion, B B: apertures in the ceiling- plate, communicating with the pipe C C: by which the heated air of the room is conveyed away'. From "Illustrated London News", 1862.