what is the chemical given to a patient to reduce the pain?

In 1799 who accidentally discovered that inhaling nitrous oxide made you less aware of pain?

who was Horace Wells?

What were some of the problems in using ether?

In c1850 who discovered that chloroform could be a better anaesthetic than ether?

why did the Victorians not want pain relief?

what did John Snow develop in 1848?