168. To draw the elevations of the stones of the circular part, it is necessary to show their location in plan, and, starting from the semi-pilaster which forms the junction of the portico with the cir cular walls, the stones are of the same length as those of the straight wall at the back of the portico. For .the derails of the circular cornice, the divisions in plan must also be made. The plan of this temple is shown in Fig. 29.
169. In Plate XXXI 1.8 shown a temple that is entirely circu.. lar in plan and surrounded by a circular colonnade of Corin thian columns. The ceiling of the domed interior is similar to that of the building shown in Plate XXX, while the ceiling of the narrow porch outside the wall of the building is ornamented with coffers or panels, as is shown on the plan below. This temple is also to be drawn out to the size of 13X18 inches.
170. The axis of the colonnade is a circle of a radius of three entablatures and twenty parts, this circle being divided into twenty equal parts which give the spacing of the columns. The width of the portico, from the axis of the columns to the circular wall which is thirty parts thick, is one Ell. The colonnade is raised on a circular platform reached by seven steps, while the floor of the hall is raised one step above this level. The entrance to this ball is a doorway two entablatures seventy-nine parts in height by one entablature and twenty parts in width. Half of the plan shows the arrangement of the columns and shows that their capitals are placed square with the radii which pass through the columns. It will be necessary in drawing an elevation, to draw the plan of all the capitals since each one is seen in a different position, and it is only by means of the plan that the position of the details which make up the capital can be determined. Notice that the plinths of the bases, which, up to the present time have been square in plan, are here circular because their corners would partially block up the spaces between the columns. The other quarter of the plan shows the disposition of the ceiling of the portico, the soffit of the exterior cornice, and the caissons of the cupola.
171. The ceiling of the portico rests upon a small cornice and is divided into panels, which correspond to the columns and the spaces between the columns. In order to draw the caissons of the
cupola, it will be necessary to repeat Plate R and go back to this study for the details of the lantern.
172. In Plate XXXII is found a pavilion in the Mutular Doric Order. It is t be drawn with the border line of the same size as in the other plates, but, by omitting the plan her© shown, it will be possible to increase the height of the building consider ably and still bring it within the outlines of the drawing.
173. This small building is raised ten steps above the level of a garden, and is composed of a portico "in antis," giving access to the room beyond. The plan forms a square from center to cen ter of the corner pilasters. This dimension corresponds to nine divisions, center to center, of the triglyphs in the entablature.
174. The four pilasters of the lateral facade form three regu lar bays of three spacings of the triglyphs. The intercolumniation in the center of the principal facade or portico is three entabla tures, five times the distance from the center of one triglyph to the center of another, which is sixty parts, and the space between the antae and the columns is one entablature and twenty parts, or twice the distance between the triglyphs, center to center. The depth of the portico corresponds to one bay of the pilasters of the lateral facade, and the divisions of the pilasters of the• rear facade cor respond to the columns of the portico. In the middle of this rear facade is found a window which lights the interior; this window is twice its width in height and is placed above a wainscot of the height (1 En) shown in the section. s 175. The entrance door is decorated with a frame similar to that in Plate XXV, and has an entablature with a pediment whose details are given on this plate at C. The entablature which sur rounds the ceiling of the portico and of the hall is also the same as was used in Plate XXV.
176. The bases of wall and portico, and of the lateral and rear facades, are composed of a plain pedestal, or dado, one entablature in height, and with a rusticated part three entablatures high.