emities is not so self-evident at the first glance, let us examine why thelower extremity of this upright or vertical line ap-pears below its higher extremity. By referring to the illustration of the course ofthe rays of light, we see that the ray of lightwhich conveys to the eye the image of the… … of the line, the lower extremity of the line ap-pears lower than its higher extremity. If the position of the line be now changed,placing it at a higher elevation than the eye, withits extremities on the same level, but unequallydistant from the eye, we find that the ray of lightwhich conveys to…
Design · Decoration and ornament · Art
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