The microscope; an introduction to microscopic methods and to histology . e note to § 181). This is accomplished in two distinct ways : (A) By a camera lucida reflecting the rays from the microscope sothat their direction when they reach the eye coincides with that of therays from the drawing paper, pencil, etc. In some of the cameralucidas from this group (Wollastons, Fig. 112), the rays are reflectedtwice, and the image appears as when looking directly into the micro-scope. In others the rays are reflected but once, and the image hasthe inversion produced by a plane mirror. For drawing purpo
The microscope; an introduction to microscopic methods and to histology . e note to § 181). This is accomplished in two distinct ways : (A) By a camera lucida reflecting the rays from the microscope sothat their direction when they reach the eye coincides with that of therays from the drawing paper, pencil, etc. In some of the cameralucidas from this group (Wollastons, Fig. 112), the rays are reflectedtwice, and the image appears as when looking directly into the micro-scope. In others the rays are reflected but once, and the image hasthe inversion produced by a plane mirror. For drawing purposes this CH. V] DRA WING WITH THE MICROSCOPE 123 inversion is a great objection, as it is necessary to similarly invert allthe details added free-hand. (B) By a camera lucida reflecting the rays of light from the draw-ing paper, etc., so that their direction when they reach the eye coin-cides with the direction of the rays from the microscope (Fig. 58, 109).In all of the camera lucidas of this group, the rays from the paper aretwice reflected and no inversion
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