Beck microscopes R. & J. Beck Ltd. creator text book London Beck [19--?] 1900 [New ed.]
print
ENG Label mounted on t.p.: Canadian agent: Randolph N. Hinch, Toronto. Pamphlet: "Dark ground illumination" (12 p.) published as supplement and inserted in pocket. Catalogs Microscopes QH219 B4 19-- https://www.biodiversitylibrary.org/bibliography/30235 10.5962/bhl.title.30235 OTU