Elementary treatise on physics, experimental and applied : for the use of colleges and schools (1906)
Ganot, A. (Adolphe), 1804-1887, Atkinson, Edmund, 1831-1901, Reinold, A. W. (Arnold William), 1843-1921 · New York : Wood · leaf 676
he ophthalmoscope, the patient is placed in a dark room,^^ and a lamp WiniwlK put beside him, jiin •iJitliliH 1 iii!i(il £. The screen serves to shadethe light fromhis head, andkeep it in dark-ness. Theobserver, A,holding in onehand the re-flector, em-ploys it to con-centrate thelight of thelamp… … Fig. 63, 647] Oph thalinoscope 659 Fig. 636 shows how the image of the back of the eye is produced, whichthe observer, A, sees on looking through the hole in the reflector. Let abbe the part of the retina on which the light is concentrated, pencils of raysproceeding from ab would form an inverted…
Physics
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