Alpha Ray CounterCentral Scientific Company (CENCO), Chicago, Illinois
Cat. no. 71248 (Cat. J-500, p. 592) about 1971. "Dye used to darken the water to make as dark as possible a background-NIGROSIN" Ralph Gibson.
Overall: 7 7/8 x 4 7/16 in. (20 x 11.3 cm)
Hood Museum of Art, Dartmouth College: Allen King Collection of Scientific Instruments, Hood Museum of Art, Dartmouth College
North America, United States
Scientific Instrument: Optics
Scientific Instrument - Optics
Not on view