Snow’s chloroform inhaler, 1858 was designed by John Snow (1813-58). He was the first specialist anaesthetist in Britain and he administered anesthesia to Queen Victoria during the birth of her son Leopold in 1853. He is considered to be one of the fathers of epidemiology, because of his work in tracing the source of a cholera outbreak in Soho, England, in 1854.
John Snow is known as one of the fathers of epidemiology. He did research on two different water companies and concluded that the cholera outbreak in Soho, England was due to contaminated water. He is also known for "Shoe leather epidemiology", researchers going house to house for research.