Imp. cui a secretis fuit.
From about 1864 he occupied himself almost exclusively with spectrum analysis, both of stars (Catalogo delle stelle di cui si e determinato lo spettro luminoso, Paris, 1867, 8vo; "Sugli spettri prismatici delle stelle fisse," two parts, 1868, in the Atti della Soc. Ital.) and of the sun (Le Soleil, Paris, 1870, 8vo; 2nd ed., 1877).
The CUI take account of signaling headways on the route, and the mixture of trains.
At first few Chinese identified with or enjoyed Cui 's provocative lyrics and sandpaper vocals.
They are actually designated by Theodosius, " servi terrae cui nati suet."