This page has been validated.
PLATE V.
89
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/d/d8/An_Elementary_Treatise_on_Optics_image_89.png/150px-An_Elementary_Treatise_on_Optics_image_89.png)
90
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/0/09/An_Elementary_Treatise_on_Optics_image_90.png/150px-An_Elementary_Treatise_on_Optics_image_90.png)
91
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/e/ec/An_Elementary_Treatise_on_Optics_image_91.png/150px-An_Elementary_Treatise_on_Optics_image_91.png)
92
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/1/18/An_Elementary_Treatise_on_Optics_image_92.png/150px-An_Elementary_Treatise_on_Optics_image_92.png)
93
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/2/21/An_Elementary_Treatise_on_Optics_image_93.png/150px-An_Elementary_Treatise_on_Optics_image_93.png)
94
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/5/56/An_Elementary_Treatise_on_Optics_image_94.png/150px-An_Elementary_Treatise_on_Optics_image_94.png)
95
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/e/e4/An_Elementary_Treatise_on_Optics_image_95.png/150px-An_Elementary_Treatise_on_Optics_image_95.png)
96
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b2/An_Elementary_Treatise_on_Optics_image_96.png/150px-An_Elementary_Treatise_on_Optics_image_96.png)
97
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/5/59/An_Elementary_Treatise_on_Optics_image_97.png/150px-An_Elementary_Treatise_on_Optics_image_97.png)
98
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/6/6b/An_Elementary_Treatise_on_Optics_image_98.png/150px-An_Elementary_Treatise_on_Optics_image_98.png)
99
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/6/6f/An_Elementary_Treatise_on_Optics_image_99.png/150px-An_Elementary_Treatise_on_Optics_image_99.png)
100
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/2/2d/An_Elementary_Treatise_on_Optics_image_100.png/150px-An_Elementary_Treatise_on_Optics_image_100.png)
101
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/c/c9/An_Elementary_Treatise_on_Optics_image_101.png/150px-An_Elementary_Treatise_on_Optics_image_101.png)
102
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/b/be/An_Elementary_Treatise_on_Optics_image_102.png/150px-An_Elementary_Treatise_on_Optics_image_102.png)
103
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/a/a3/An_Elementary_Treatise_on_Optics_image_103.png/150px-An_Elementary_Treatise_on_Optics_image_103.png)
104
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/9/93/An_Elementary_Treatise_on_Optics_image_104.png/150px-An_Elementary_Treatise_on_Optics_image_104.png)
105
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/5/55/An_Elementary_Treatise_on_Optics_image_105.png/150px-An_Elementary_Treatise_on_Optics_image_105.png)
106
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/2/28/An_Elementary_Treatise_on_Optics_image_106.png/150px-An_Elementary_Treatise_on_Optics_image_106.png)
107
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/f/f3/An_Elementary_Treatise_on_Optics_image_107.png/150px-An_Elementary_Treatise_on_Optics_image_107.png)
108
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/6/6d/An_Elementary_Treatise_on_Optics_image_108.png/150px-An_Elementary_Treatise_on_Optics_image_108.png)
109
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/a/a5/An_Elementary_Treatise_on_Optics_image_109.png/150px-An_Elementary_Treatise_on_Optics_image_109.png)
110
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b4/An_Elementary_Treatise_on_Optics_image_110.png/150px-An_Elementary_Treatise_on_Optics_image_110.png)
111
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/d/df/An_Elementary_Treatise_on_Optics_image_111.png/150px-An_Elementary_Treatise_on_Optics_image_111.png)
112
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/2/2c/An_Elementary_Treatise_on_Optics_image_112.png/150px-An_Elementary_Treatise_on_Optics_image_112.png)
113
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/0/0f/An_Elementary_Treatise_on_Optics_image_113.png/150px-An_Elementary_Treatise_on_Optics_image_113.png)
114
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/7/79/An_Elementary_Treatise_on_Optics_image_114.png/150px-An_Elementary_Treatise_on_Optics_image_114.png)
115
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/8/8c/An_Elementary_Treatise_on_Optics_image_115.png/150px-An_Elementary_Treatise_on_Optics_image_115.png)
116
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/2/2e/An_Elementary_Treatise_on_Optics_image_116.png/150px-An_Elementary_Treatise_on_Optics_image_116.png)
117
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/6/65/An_Elementary_Treatise_on_Optics_image_117.png/150px-An_Elementary_Treatise_on_Optics_image_117.png)
118
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/e/ec/An_Elementary_Treatise_on_Optics_image_118.png/150px-An_Elementary_Treatise_on_Optics_image_118.png)
119
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/8/8e/An_Elementary_Treatise_on_Optics_image_119.png/150px-An_Elementary_Treatise_on_Optics_image_119.png)
120
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b1/An_Elementary_Treatise_on_Optics_image_120.png/150px-An_Elementary_Treatise_on_Optics_image_120.png)
121
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/c/ca/An_Elementary_Treatise_on_Optics_image_121.png/150px-An_Elementary_Treatise_on_Optics_image_121.png)
122
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/f/f5/An_Elementary_Treatise_on_Optics_image_122.png/150px-An_Elementary_Treatise_on_Optics_image_122.png)
123
[return]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/4/47/An_Elementary_Treatise_on_Optics_image_123.png/150px-An_Elementary_Treatise_on_Optics_image_123.png)