艺术家: Louis Jules Duboscq
博物馆: Museo della Radiologia (Palermo, Italy)
术: 铜
此设备被用在了色度学上. 它测量出两个染色盆之间的浓度差异. 它由一对玻璃圆筒相接而成的圆柱光管组成,以两个圆柱形玻璃托盘相接而成,并被可倾斜的长方形玻璃支撑. 仪器位于长方形铸铁基上.
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