Ch XI
ERECT IMAGES IX DRAWINGS
ÎO CENTIMETER RULE
The upper edge b in millimeters the kmtr to centimeters
Fig. 211. Couect Image.
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Fig. 212. I web ted Image.
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Fig. 213. Mirror Image
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Fig. 214. Inverted Mirror Image.
Fig. 211-214. Figures of a Metric Rule, Full Size, to Show Correct,
Inverted, Mirror and Inverted Mirror Images.
These representations of screen images show the result of placing the object
in different positions or of using different means in projection. The determin¬
ing factors for the position of the object for a correct screen image are:
(i ) Projection by an objective or by an objective and an amplifier (fig. 121,
126).
(2) Projection by means of two lenses or of an objective and an ocular
(fig. 207, 208).