Safety lamp could create a sufficient updraft that firedamp would not penetrate down the chimney. Further observations of the speed of flame fronts in fissures and passageways led him to design a lamp with fine tubes admitting the air. Sir Humphry Davy was asked to consider the problems of a safety lamp following the Felling explosion. Previous experimenters had used coal gas (chiefly carbon monoxide) incorrectly, believing it to be the same as firedamp. Davy however performed his experiments with samples of firedamp collected from pits. As an experimental chemist, he was familiar with flames not passing through gauze; his experiments enabled
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