Gustav Robert (ˈɡʊstaf ˈroːbɛrt). 1824–87, German physicist. With Bunsen he developed the method of spectrum analysis that led to their discovery of caesium (1860) and rubidium (1861): also worked on electrical networks
Kirchhoff in American English
(ˈkɪʀçˌhɔf)
ˈGusˈtav Robert (ˈgʊsˌtɑfˈ ʀoʊˌbɛʀt) 1824-87; Ger. physicist