John Buddle mining engineer. He succeeded his father as manager at Wallsend Colliery in 1806, though his work was not limited to just the local colliery. Buddle was involved with the introduction of the miners safety lamp invented by Humphry Davy being involved in the earliest discussions with Davy in August 1815 and providing "fire-damp" samples for experiments in Davy's London Laboratory. The moment when Buddle tested the new Davy safety lamp for the first time, for real, in Northeast England, is recorded by him in a report to the Select Committee on Accidents in Mines on 4 September 1835 "I first
Fluorescent lamp of them employed fluorescent coatings, but these were used primarily for color correction and not for enhanced light output. Mercury vapor lamps also anticipated the fluorescent lamp in their incorporation of a ballast to maintain a constant current. Cooper-Hewitt had not been the first to use mercury vapor for illumination, as earlier efforts had been mounted by Way, Rapieff, Arons, and Bastian and Salisbury. Of particular importance was the mercury vapor lamp invented by Küch in Germany. This lamp used quartz in place of glass to allow higher operating temperatures, and hence greater efficiency. Although its light output relative to