68,185 pages read across the site in the last 24 hours · 48 pages a minute on average · 25 countries in the last 30 days

Free, with Google. The research on this page is open to everyone and always will be; signing in is what lets us serve the pages.

Microscopical tube-length and the parts included in it by the various opticians of the world : the thickness of cover-glass for which unadjustable objectives are corrected

1888G General

— (0)

Details

loading…

Transcript

Open to load the transcript.

Summary