7.(Pg. [195]) The pupils dilate and contract, what purpose does this answer?
8.(Pg. [196]) How could you observe the dilatation and contraction of the pupils?
9.(Pg. [196]) What purpose is the choroid said to answer?
10.(Pg. [196]) In what animals is the change in the iris greatest?
11.(Pg. [196]) What are the three humours denominated, and how are they situated?
12.(Pg. [197]) What is the part represented at i i, and of what does it consist?
13.(Pg. [197]) What are the respective uses of the humours, and of the retina?
14.(Pg. [197]) Why is it necessary the rays should be refracted?
15.(Pg. [197]) How is this illustrated by [fig. 3 and 4, plate 21]?
16.(Pg. [198]) What causes a person to be short-sighted? [fig. 5, plate 21.]