Glass prism for optical experiments
Glass prism for optical experiments, with lugs (for mounting in frame), 1601-1700 (?), length 7 1/2-inches, length of sides 1 5/8-inches.
Glass prism for optical experiments, with lugs (for mounting in frame), 1601-1700 (?), length 7 1/2-inches, length of sides 1 5/8-inches.