Physical laboratory experiments : mechanics, optics and heat (1917)
Goodwin, H. M. (Harry Manley), 1870- · Boston : G. H. Ellis Co., Printers · leaf 170
cted bymeans of the mirror, M, in the direction of the optic axis ofthe instrument. One side of the mirror is plane, the otherconcave. The latter is used to concentrate the light on theslide only when it is examined with a medium or a high-powerobjective. The plane mirror gives ample illumination… … 42 PHYSICAL LABORATORY EXPERIMENTS but not glaring light. If the illumination is too strong or tooweak, the eye quickly becomes fatigued. Except for workwith high-power objectives, the condenser and lower sub-stage diaphragm should be swung aside, and the illuminationregulated by the plane mirror…
Physics · Mechanics
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