1. Nitrous Oxide (Laughing Gas)

2. What is it? Nitrous oxide (N 2 O) or laughing gas is a gas that do not have colors, and this gas is fireproof. Nitrous oxide has a pleasant smell and taste sweet Nitrous oxide is used for medical proposes

3. Doctor will use Nitrous oxide in surgery and dentists are also using this gas to reduce the pain or analgesic effects People know them as laughing gas, because when you breathe in it will make you become happy Sometime people used them to fuels cars in the racing field

4. Discovery Nitrous oxide was discovered by Joseph Priestly in 1772 Joseph made this gas by heating iron and used nitric acid The first time people used this gas for some benefits is when Thomas Beddoes and James Watt discovered that this gas can be used in medical ways

5. Medical Usage It can be used to cure lung diseases Sir Humphrey Davy is the supervisor at that time and he noted that this gas has analgesic effects and it can be used for the surgical operation The first time people use this gas as a pain killer was in 11 December 1844 by an American dentist Horace Wells and his co- operators

6. He tested on 12-15 of his patients and only 2 of them are failed, so people are very concerned about this gas because it might give negative effects, so they do not risk using this gas However, one of Horace helpers successfully used this gas

7. His name is Gardner Quincy Colton He built his own dental clinic in New York City Today, nitrous oxide is widely used as an analgesic drug in dental world

8. Abuse Usage This gas is very popular in high class of English people or noble men They often used this gas when they have party They got drunk because of this gas