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 in the schools from which she graduated. She followed this vocation until her marriage in 1844 to J. Weston Miner. Her husband being connected with the "Battle Creek Review" and Herald publishing house, Miner was engaged as a proof-reader, and finally as a writer, editing a large share of the work on a series of children's books issued from that office. She had always shown a predilection for writing both verse and prose. When teaching, she sometimes wrote stories or verses to reprove faults among her pupils that she preferred to correct in an impersonal way, and folding her pages