Simply Jan on Flickr Professor of Chemistry Sir Humphry Davy 1778-1829. Properties of Nitrous Oxide 1799. Discovery of Elements by Electrolysis 1807. Miner's safety lamp 1815. Anchor Road, Bristol by Retired Professional Engineers Club (Bristol) Colour: blue Wikimedia: Flickr: Google Streetview OpenStreetMap See also... sleepymyf on Flickr gnomonic on Flickr
