adjustable slit with micrometer
Date1875-1900
Inventory Number2007-1-0381
ClassificationSlit
Subject
Maker
American
?
Maker
English
?
Cultural Region
Dimensions12.1 × 15 × 4.4 cm (4 3/4 × 5 7/8 × 1 3/4 in.)
Material
DescriptionAn adjustable slit is operated by a micrometer screw with a calibrated scale. The scale is made of ivory plastic. The slit is mounted on the end of a draw tube that would have been inserted into a collimating telescope.
Signedunsigned
