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
The Man Who Invented Christmas (film) with an average rating of 6.3/10. The website's critical consensus reads, ""The Man Who Invented Christmas" adds holiday magic to the writing of "A Christmas Carol", putting a sweetly revisionist spin on the story behind a classic yuletide tale." On Metacritic, which assigns a normalized rating to reviews, the film has a weighted average score 60 out of 100, based 32 critics, indicating "mixed or average reviews". The Man Who Invented Christmas (film) The Man Who Invented Christmas is a 2017 biographical drama film directed by Bharat Nalluri and written by Susan Coyne based on the book of the same