the lens entirely relaxed a convergent peneil would be neededto produce vision. This point would require further investiga-tion for its elucidation; the simplest test is to try if the visionof a distant object is improved by weak convex glasses; if thisis so, the latter alternative is the true one.… … Fig. 110. and that an eye placed behind the lens sees this image. Thelens so used constitutes a simple microscope or magnifyingglass and the path of the light through it is shewn in fig. 110. The apparent size of an object depends on the angle whichit subtends at the eye; as the object is brought…
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