German chemist (1811-1899) who discovered the elements cesium and rubidium and who developed the laboratory burner that now bears his name. ALS in German, signed "R. W. Bunsen," one page, lightly-lined, 8.75 x 5.5, April 17, 1884. In full (translated): "I will begin my lectures in Experimental Chemistry Thursday, April 24 at 9 o'clock in the morning, the practical chemical experiments in the laboratory Friday April 25 at 10 o'clock." In fine condition, with mailing folds and some mild scattered wrinkling and toning. A terrific scientific reference by the esteemed chemist.
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