On angular aperture of objectives for the microscope : read before the Microscopical Congress at Indianapolis, Ind., August 15th, 1878 (1880)
Blackham, Geo. E. (George E.), National Microscopical Congress (1878 : Indianapolis, Ind.) · New York : Industrial Publication Co. · leaf 11
ON ANGULAR APERTURE OF OBJECTIVES FOR THE MICROSCOPE. … I am fully aware that newspaper reports of scientific statements are not always to be relied upon; but I hope that in this case the eminent lecturer has been reported correctly, for as it stands the passage I have quoted is a most excellent statement of the principal function of the object-glass of…
Microscopy · Lenses · Geometrical optics
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
