photomètre
2000 / The Trouble with the Instrument: Zöllner's Photometer / Klaus Staubermann / Journal for the History of Astronomy 31 (2000) p. 323 [lien]
2000 / To See Or Not To See: The Uses of Photometers and Measurements of Reflective Power / Xiang Chen / Perspectives on Science 8 (2000) p. 1 [doi]