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III.

SECT. dado or fhaft of the pedestal. It must also be particularly noticed, that the proportions of the treads of the steps are obtained by lines drawn to the distances of the vanishing points; but the lines which produce the forms of the steps must be drawn to the vanishing points.

Plate
XVI.

A Garden Seat.

PLATE
XVII.

In Plate XVII. is an example for a building with a pediment, which may be confidered as adapted to contain feats or other accommodations in a garden.

The center of the picture is C, the distance or eye is at D.

HH is the horizontal line.

P P is the parallel of the picture, as written.

L 1 is the radial or parallel of the front K of the building, which is inclined to the picture in an angle of 38°.

L2 is the radial or parallel of the fides of the building, which are perpendicular to the front, as the fide S.

*BB is the bafe line.

The vanishing points are V 1 and V 2, determined by the radials L1, L2 (as before taught, Page 95); and d 1, d 2 are the distances of thofe vanishing points.

After having studied the instructions, and practifed the rules which are given in the preceding part of this Section, particularly thofe of the Example of a houfe inclined to the picture; the student will not require to have them repeated here, for the conftruction of

* In all architectural reprefentations, it will ever be the moft convenient practice to place the object immediately upon the bafe line; as in this example, in which the point A is the interfection of the picture, or feat of the angle upon the base line. And after the representation of the building is obtained, to add as much space below as may make the whole appear pleasant to the eye, as the line X X was added at pleasure, after the object was finished.-This method will fave a great deal of trouble, yet be equally true, as if the building had been drawn at the fame apparent distance from the line X X as it now appears.

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III.

Plate

this figure is produced by the fame procefs which was employed in SECT. that example, with the addition of the pediment; for the construction of which, inftructions are given in the next Section.

Yet it may be proper to obferve, that the heights of the funk pannels, and of the fluted fafcia, are determined by fetting up their dimenfions from the point A, upon the angle of the building A f, as at the points a, b, d, h, &c. and from thofe points drawing lines to the vanishing points V 1 and V 2; which lines determine the heights of the required parts.

The breadths of those parts are found by fetting their measures upon the bafe line B B, from the angle A to the points 1, 2, 5, 4, and 5, on the left fide, and from the fame angle to the points 7, 8, and III, on the right fide, and from every one of thofe points drawing lines to the distances of the vanishing points; as thofe on the left fide are drawn to the point d 1, which is the distance of the vanishing point V 1, and those on the right are drawn to the point d 2, which is the distance of the vanishing point V 2.

The rails or palifadoes, marked M, at the back of the building, are parallel to the front and back; confequently have the fame vanishing point with the front, which is V 1.

The line of pofts and chains is parallel to the ends or fides of the building; confequently has the fame vanishing point with the ends, which is V 2.

The figures of the man and woman are fuppofed of equal heights with the fpectator who views the building; therefore the horizontal line of this example paffes through the eyes of thofe figures.

The feale by which the building is drawn, is given at the bottom of the print; therefore the ftudent who confiders this example may eafily obtain the measures of all the parts; and it will be a good practice for him to employ the following method:

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XVII.

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