portrait of humphry davy, an english naturalist, chemist, and writer, known notably for discovering the pain-relieving effects of nitrous oxide - 漢弗里·戴維 幅插畫檔、美工圖案、卡通及圖標美國文化
sir humphry davy, (17 december 1778 – 29 may 1829) was a cornish chemist and inventor who invented the davy lamp and a very early form of arc lamp - 漢弗里·戴維 幅插畫檔、美工圖案、卡通及圖標