Safety lamp it. Air is drawn in and descends just inside the glass, passing up through the flame in the centre of the lamp. The outer casings of lamps have been made of brass or tinned steel. If a lamp bangs against a hard piece of rock a spark could be generated if iron or untinned steel were employed. Within months of Clanny's demonstration of his first lamp, two improved designs had been announced: one by George Stephenson, which later became the Geordie lamp, and the Davy lamp, invented by Sir Humphry Davy. Subsequently, Clanny incorporated aspects of both lamps and produced
S. Isadore Miner Woman's Council, by which she was chosen one of its delegates to the National Woman's Council. By 1904, she was converting women's social clubs into civic reform organizations. In 1900, she married William Allen Callaway. She died in Dallas, Texas, August 10, 1916, and was buried at Restland Memorial Park in that city. S. Isadore Miner S. Isadore Miner (September 25, 1863 – August 10, 1916), also known by the pen name Pauline Periwinkle, was an American journalist, poet, teacher, and feminist. She served as the first corresponding secretary of the Michigan Woman's Press Association and was a staff member