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 51
Figure 11. Tollea' Student I Dry, Covered Dry Mount. Diameter of Exposed Front, 016. Working Distance, 0-009. Thic kness ot Cover and Air Space, 0-010. Total Frontal Distance, 0-019. Resulting Angular Aperture [a lit Weuham), 153° 16', … AIR f Geo. E. Blackham. M.D.. Del.
Microscopy · Lenses · Geometrical optics
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