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22. What would two diameters of a circle drawn perpendicular to each other be called in geography?
23. What are the ends of the axis called? (p. 29.)
24. What are arcs of circles passing through both poles called in geography?
25. Where are the centres of these arcs?
26. What are the arcs called in geography, which are drawn nearly parallel to the equator? (p. 30.)
27. Where will be the centre of these arcs?
28. What is an Ellipse?
29. How do you proceed to make an Ellipse?
30. What Geometrical rule can you give for drawing an Ellipse?
31. What amusing method is used?
32. How may the figure be made more or less elliptical?
33. How must you proceed to draw a Cone?
34. What is the difference between a Cone and a Pyramid? (p. 22.)
35. What is the height of a Cone?
36. When is a Cone said to be upright?
37. Why does the base of a cone appear to be an Ellipse?
38. What is a Cylinder? (bot. of p. 32.)
39. What is the height of a Cylinder? (p. 33.)
40. When is a cylinder said to be upright?
FIFTH CLASS.
1. How are the figures of the fifth Class formed? (page 34.)
2. What is the general name of fillets, beads, congees, &c.?
3. What is a Torus? (p. 35.)
