細節
A Butyro-Refractometer
by Carl Zeiss, Jena, No. 1489, with hot water connections, thermometer and instruction book, in fitted wood case -- 13¾in. (35cm.) wide
by Carl Zeiss, Jena, No. 1489, with hot water connections, thermometer and instruction book, in fitted wood case -- 13¾in. (35cm.) wide