Davies, Charles, 1798-1876 · New York, Cincinnati [etc.] American book company · leaf 47
int is a plane perpen-dicular to the radius of the earth drawn to that point. 58. A Vertical Plane is a plane perpendicular to a hori-zontal plane. 59. A Horizontal Line is any line of a horizontal plane. 60. A Vertical Line is a line perpendicular to a hori-zontal plane. 61. An Oblique Line is a… … SEC. IV.] DEFIKITIOKS. 41 62. The Horizontal Distance between two points is thehorizontal line iutercepted between the two vertical lines passingthrough those points. Thus, DC or AB (Fig. 24), is the hori-zontal distance between the two points A and C, or betweenthe points B and D. 63. A Horizontal…
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