Chronoscope
Exposure Measurement
Chronoscope
1912
Metal and glass
Overall (meter): 1 5/8 × 1 × 1 in. (4.2 × 2.5 × 2.5 cm)
Overall (box): 3 1/4 × 1 3/8 × 1 3/8 in. (8.2 × 3.5 × 3.5 cm)
Gift of Eastman Kodak Company, ex-collection Gabriel Cromer
DescriptionCylindrical actinometer and its yellow filter, with papers stored within meter, in original box.
Inscriptions Stamped in black ink, top of meter, c: CHONOSCOPE \ BREVETÉ \ S.G.D.G. \ MARQUE \ DÉPOSÉE
