Humphry Davy Describes Nitrous Oxide

This is the published version: ‘By degrees as the pleasurable sensations increased, I lost all connection with external things; trains of vivid visible Images rapidly passed through my mind and were connected with words in such a manner, as to produce perceptions perfectly novel. I existed in a world of newly connected and newly modified ideas. I theorized; I imagined that I had made discoveries. When I was awakened from this semi-delirious trance by Dr Kinglake, who took the gas-bag from m...