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"A Transcript of Lessons Given in the Primary Department of School No. 49, New York City"

"
Why is the ball-shape best for the eye?--"It looks best, and may be rolled
in every direction."
What part of the eye do we see through?--"The black spot in the centre."
What is it called?--"The pupil."
What shape is the pupil?--"Round like a circle."
What color is the pupil?--"Black."
Of what use is the pupil?--"To let light into the eye; to see through."
What is around the pupil?--"A colored ring."
What is the colored ring called?--"The iris."
Of what use is the iris?--"It acts like a curtain to the eye; it lets in
and keeps out light from the pupil."
Of what shape is the iris?--"Round like a ring."
Of what color is the iris?--"Sometimes blue, sometimes brown, sometimes
gray."
Does the iris always appear the same in size?--"It does not: sometimes it
looks large, sometimes small."
When is it the largest?--"When it rolls over the pupil to keep out the
strong light."
When is it the smallest?--"When it rolls backward, to let light into the
pupil."
When is the pupil the largest?--"When we are in the dark."
When is the pupil the smallest?--"When we are in a bright light."
What color is the eyeball?--"White."
What shape is the eyeball?--"Round like a ball."
How is the eyeball held in its socket?--"By cords made of flesh.


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