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An Explanation of such Un-usual words as you may find in this Book.
Arch. A peece of a Circle. As in Oper. 2 c d is an Arch of a Circle. Axis. is that straight line whereon any Body moves circularly, as in the line a a in Operat. 21. is the Axis of the Door.
Base. See Chap. 2 Defin. 1 Broken beams. See Chap. 1 Defin. 4.
Capital. The top of a Column. Catuzes. e f in fig. 22 are Catuzes. Catop∣trick. See Chap. 1 Defin. 3. Center. The middle point of a Circle, or any other figure. Cilinder. A straight round Body, flat at either end. Fig. 53.
Column. The upright Pillars markt x a b y c t in fig. 30. Composite Order. an Order in Architect. See Vignola. Cone. Fig. 54. Corinthian Order. An Or∣der in Architect. See Vignola. Cube. A Square Body of six equal sides, as I K L in fig. 19 are Cubes.
Diagonals. See Chap. 2 Defin. 8. Diagonal Squares. The squares in fig. 16. are all Diagonal Squares, because all their sides are Diagonal lines. Diametrial. See Chap. 2 Defin. 7. Dioptrick. See Chap. 1. Defin. 4. Direct beam. See Chap. 1. Defin. 2. Distance. See Chap. 2 Defin. 5. Dorick Order. An Order in Architect. See Vignola.
Equilateral Triangle. A Triangle of equal sides, as are the Triangles d e f in fig. 5.
Geometrick Figure or Body. is a Figure or Body that hath its true demensions.
Ground line. See Operat. 51. Ground-plain. A plain full of Squares as fig. 15. 16.
Height. See Chap. 2 Defin. 2. Hexagon. A figure of six equal sides is a Hexa∣gon; as the two figures in fig. 6. are Hexagons. Horizon. See Chap. 2. Defin. 4.
Ichnography. See Chap. 1 Defin. 6. Intersection. Two lines crossing one ano∣ther are said to intersect each other. Ionick Order. An Order in Architect. See Vignola.
Luminious Body. Light body, as in fig. 51. 52. to 56. at a is the Luminous body.
Newel. is the upright post a pair of winding stairs winde about.
Object. See Chap. Defin. 9. Occult. Occult lines or Arches are dark lines or Arches: which are only drawn for direction to make the Figure up by: these are throughout this book represented by prickt lines and arches. Octagon, a Fi∣gure of eight equal sides is an Octagon. As are the two Figures in Fig. 8. Opa∣cous body. A Dark body As in Fig. 51. 51. 53. 54. 55. 56. the bodies obstructing beams of Light are Opacous bodies. Optick. See Perspective. Chap. 1 Defin. 1. Orthography. See Chap. 1 Defin. 9.
Parallel. Parallel lines are straight lines that are all the way equally distant from one another; as the Base and Horizon throughout this book, are all parallel to to one another. Parallellepippedon. is a square body that hath its four sides longer than its two ends, As in fig. 56. the square body f g. Pedestal. A square body whereon a Column is set, as d in fig. 28. Pentagon. A Figure of five equal sides, as are the two figures in fig. 7. Perpendicular. A line that falls plumb upon another line, without leaning to one side or another is a Perpendicular line. Perspective. See Chap. 2 Defin. 1. Pilasters. Square Pillars that usually stand behind Columns to bear Arches &c.
Quadrat. A square figure of four equal sides. Quadrant. A figure containing the fourth part of a Circle.
Radius. Half the Diameter of a Circle. Reflected beams. See Chap. 1 Defin. 3. Right Angle. is made by two lines exactly Perpendicular to one another.
Scenography. See Chap. 1 Defin. 10. Section. See Chap. 2 Defin 6. Semi-circle. Half a Circle. Station. The place you stand on.
Tetrahedron. is a Body whose four Plains are four Triangles, as in fig. 55. Tube. a long hollow instrument wherein is usually a Glass fitted, to observe ob∣jects through. Tuscan Order. An Order in Architect. See Vignola.
Visual point. See Chap. 2 Defin. 3. Visual raies. See Chap. 2 Defin. 7.