Thalen, Robert

The spectra of scandium and ytterbium were first studied by Tobias Robert Thalen (22, 32). Although scandium salts possess no visible... 

Hasselberg, Biografier. Tobias Robert Thalen, Kungl. Svenska Veten-... 

Tobias Robert Thalen was born in 1827 in Koping. He studied in Uppsala and remained at that university as co-worker of Angstrom and from 1874 as his successor heading the department of physics. He was a member of the Swedish Academy of Science. He died in 1905. 

The physicists themselves also contributed to the field, especially the professor of physics in Uppsala, Robert Thal n (1827-1905), with whom Cleve regularly worked. Thalen published and wrote articles on the spectral lines of many of the rare earth metals, and Nilson, Cleve, and others almost always referred to him in their articles. But all publications in the field by both chemists and physicists remained descriptive and almost clinically free from outspoken theoretical statements. They were simply presented as the result of long work and many observations that had been difficult to carry out—sometimes extremely difficult. ... 

Robert Thalen, Spektralundersokningar rorande Skandium, Ytterbium, Erbium och Thulium [Spectral Analysis on Didymium, Ytterbium, Erbium and Thulium], Ofversigt KVA 38 6 (1881), 13-21 idem, Om de lysande spektra hos Didym och Samarium [On the Luminous Spectra of Didymium and Samarium], Ofversigt KVA 40 7 (1883), 3-16. 

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