Show electricity AS illuminant commercial value wat was not developed in this country until after the centennial exhibition of 1876 the first experimental philosopher to discover that electric light could be produced by a dry battery was sir fl umphry davy who in 1810 exhibited ft a light three inches long between carbon points before the royal society of london but no commercial value was attached td to the use ulle of electricity as an illuminant until more than half a generation later idler the centennial exhibition hibi hibit tion lon held in philadelphia I 1 in n 1876 really marks the era of our present form of electric light though electric lights had been in use abroad prior to that time the exhibition of models and practical demonstrations of electric lights at philadelphia in 1876 attracted the attention of scientists and capitalists in this country and the first incandescent lamps and the first are arc system were put to practical use in a small way in 1676 the brush are arc light gained favor in the beginning as the most adaptable for street lighting and cleveland 0 the home of charles francis brush the invent or was waa the initial american city to adopt tho the are arc system tor for street lighting since 1878 both the brush are arc system and the edison incandescent system have developed morless Mor Alor leys magazine |