A primary astronomy .. . * A-RE-A. f Sphe-roid. PRIMARY ASTRONOMY. 17 OBLONG 45. Describe an Oblong is an elongated sphere. [This figure, like an Oblate Spheroid, admits of variousdegrees of departure from the spherical form. It may bemuch or but slightly elongated, and the ends may be alikeor otherwise. A common egg is an Oblong Spheroid.] 46. What is meant by the Axisof a Sphere? It is the line, real or im- axis (%aginary, around which it re-volves. _J3U [A wire run through the center of a round apple would represent the axis of asphere.] 47. What are the Poles of a Sp
A primary astronomy .. . * A-RE-A. f Sphe-roid. PRIMARY ASTRONOMY. 17 OBLONG 45. Describe an Oblong is an elongated sphere. [This figure, like an Oblate Spheroid, admits of variousdegrees of departure from the spherical form. It may bemuch or but slightly elongated, and the ends may be alikeor otherwise. A common egg is an Oblong Spheroid.] 46. What is meant by the Axisof a Sphere? It is the line, real or im- axis (%aginary, around which it re-volves. _J3U [A wire run through the center of a round apple would represent the axis of asphere.] 47. What are the Poles of a Sphere. The extremities of its axis, or the points where theaxis cuts the two opposite surfaces. 4§. Describe the Equator of a Sphere. It is an imaginary circle upon its smface, midwaybetween its poles, the plane of which cuts the axis per-pendicularly, and divides the sphere into two equalparts or hemispheres. 49. By what other name is the Equator of a Sphere sometimesdesignated ?* It is sometimes called a Great Circle, because nolarger circle can be drawn upon a sphere. 50. What is
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectastronomy, bookyear18
