On the focal length of microscopic objectives
By: by Chas. R. Cross
Publisher: [s.n.]
Published: 1870
Place of publication: Boston?
Language: eng
Number of pages: 12
Subjects: Optical instruments; Microscopes; Microscopy; Instrumentation; Lenses
Notes: Caption title.

"Contributions from the Physical Laboratory of the Massachusetts Institute of Technology."

Dated on p. 12: Boston, May 3d, 1870.