Signedscratched on barrel: 66 x 11 x 15
scratched on solid lens collar: 64 x 8 x 22
scratched on top lens mount: 62 x 11 x 21
Inscribedengraved: PAT'D Sept. 25, 1855
inner sleeve scratched: L A
Related WorksDeborah Jean Warner, "The Microscopes and Telescopes of Robert B. Tolles,"
Rittenhouse 9 (1995): 65-83.