Robert Wilhelm (ˈroːbɛrt ˈvɪlhɛlm). 1811–99, German chemist who with Kirchhoff developed spectrum analysis and discovered the elements caesium and rubidium. He invented the Bunsen burner and the ice calorimeter
Bunsen in American English
(ˈbʌnsən; German ˈbʊnzən)
Robert Wilhelm1811-99; Ger. chemist: inventor of the spectroscope