1721 in science
# 1721 in science

The year 1721 in science and technology involved some significant events.

## Medicine

* The use of ether is developed as a pain-killer.
* Lady Mary Wortley Montagu introduces the Ottoman Turkish method of inoculation against smallpox – variolation – to London.
* Thomas Guy founds Guy's Hospital in London to treat "incurables" discharged from St Thomas'.

## Psychology

* A suggestion box is developed under the eighth shōgun of Japan, Yoshimune Tokugawa.

## Technology

* Richard Newsham of London obtains his first patent for a manual fire pump.

## Deaths

* September 11 – Rudolf Jakob Camerarius, German botanist (born 1665)
