The microscope : its construction and management : including technique, photo-micrography, and the past and future of the microscope (1893)
Heurck, Henri van, 1838-1909 · London : C. Lockwood ; New York : D. Van Nostrand Co. · leaf 23
the mirror,C a luminouspoint : a rayemanatingfromthis point andstriking themirror at I)will make, withthe perpendi-cular to thesurface of theFig. i. mirror at that point (which perpendicular is termed the normal), an angle E D F, calledthe angle of reflection, equal to C D E the angle of incidence.… … REFLECTION.
Microscopy
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