Gas detector early detection methods relied on less precise detectors. Through the 19th and early 20th centuries, coal miners would bring canaries down to the tunnels with them as an early detection system against life-threatening gases such as carbon dioxide, carbon monoxide and methane. The canary, normally a very songful bird, would stop singing and eventually die if not removed from these gases, signaling the miners to exit the mine quickly. The first gas detector in the industrial age was the "flame safety lamp" (or Davy lamp) was invented by Sir Humphry Davy (of England) in 1815 to detect the presence of
Lamp At Midnight Lamp At Midnight Lamp At Midnight is a play that was written by Barrie Stavis, and first produced in 1947 at New Stages, New York. The play treats the 17th Century Galileo affair, which was a profound conflict between the Roman Catholic Church and Galileo Galilei over the interpretation of his astronomical observations using the newly invented telescope. By coincidence, Bertolt Brecht's play on the same theme, "Galileo", opened in New York just a few weeks before "Lamp at Midnight". Some critics now consider "Galileo" to be a masterpiece, but in 1947 the "New York Times" reviewer, Brooks Atkinson, preferred