(1811-1899) German chemist. He investigated emission spectra of heated elements, and discovered caesium (in 1860) and rubidium (in 1861) with the physicist Gustav Kirchhoff.
Autograph note signed, one page, 6,5 x 4, inch, in German, Bunsen informs about the beginning of his events, written and signed in black ink "RW Bunsen", attractively mounted (removable) for fine display with a photograph, shows Robert Bunsen in a chest-up portrait (altogether 8,25 x 11,75 inch), with a central vertical letter fold, a pinhole to each corner, and mild foxing - in nearly fine condition.
"Ich werde meine Vorlesungen und die praktisch chemischen Uebungen
Montag den 25. Oktober
"I will start my lectures and practical chemical exercises
Monday October 25th