Perkin Elmer double beam infrared spectrophotometer, 1950.

Beckman DU ultraviolet photoelectric spectrophotometer, 1950s.

Nicolet 205 FT-IR infrared spectrophotometer, c 1980s.

Unicam SP 500 spectrophometer, c 1949.

Part of a Spectrophotometer, 1938-1939.

Part of a Spectrophotometer, 1938-1939.

Venus in UV light, 2004.

Woman with a musical instrument, Japan, 1867.

Ericson table telephone, 1890.

Ericson table telephone, 1890.

Wenham Ros binocular microscope, 1862.

MRA 1 tellurometer set, c 1960.