Nitrous oxide Nitrous oxide Nitrous oxide, commonly known as laughing gas or nitrous, is a chemical compound, an oxide of nitrogen with the formula . At room temperature, it is a colourless non-flammable gas, with a slight metallic scent and taste. At elevated temperatures, nitrous oxide is a powerful oxidizer similar to molecular oxygen. It is soluble in water. Nitrous oxide has significant medical uses, especially in surgery and dentistry, for its anaesthetic and pain reducing effects. Its name "laughing gas", coined by Humphry Davy, is due to the euphoric effects upon inhaling it, a property that has led to its recreational
The Laughing Cavalier (novel) The Laughing Cavalier (novel) The Laughing Cavalier is a 1913 adventure novel by Baroness Orczy, which revolves around Percy Blake, a foreign adventurer and ancestor of Orczy's famous character, the Scarlet Pimpernel. The story takes place in Holland in 1623/1624 and is partly inspired by Frans Hals' painting "The Laughing Cavalier": in the novel, Blake is Frans Hals' adopted son and the man who poses for the painting of the Laughing Cavalier. The sequel to this book, continuing the story of Percy Blake, is "The First Sir Percy". In March 1623, the Dutch nobleman Willem van Oldenbarnevelt, Lord of Stoutenburg,