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~ Example 46, fig. 46, which is the 1 ground-plan' of a pair of cottages, the division or party-wall being at mn, a a the living-room, d the kitchen, s the scullery, f the back lobby, b the front lobby: aa are fire-places, b windows, d doors. The method of copying this is given in

Example 47, fig. 47. Draw the line op, fig. 46, and bisect it, drawing from the point of bisection another line ran at right angles to op; next, as in fig. 47, draw the lines cd, ab at right angles, corresponding to those in cu

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fig. 46. Measure os, fig. 46, and lay it off from c to e, fig. 47; at right angles to this draw ef, and make it equal to sc in fig. 46. Draw eg at right angles to ce, and make it equal to ot in fig. 46; make the short' re* turn' at g equal to'that at £ in fig. 46. Parallel to gc draw gh, and make it equal to tu in fig. 46; make the return ho at right angles to gh, and equal to that at u in fig. 46. At right angles to this draw om, equal to uv;

make the return at mn equal to that at v, fig. 46; draw, parallel to a5, the line no; make ob equal to xn. The other half, which is exactly similar, should be drawn in simultaneously with the first. After the outline is thus obtained, the thickness of the walls should next be put in, as shewn by the dotted lines in fig. 47. The example in fig. 46 is also designed to shew the method of drawing a 1 bedroom plan,' or floor above the ground one, from the data given by the lines on the latter. Suppose the upper figure (in 47) to be filled in with the partitions, fire-places, <fcc. <fcc., as in fig. 46, thus representing the ground-plan finished. By means of the T square produce all the boundary-lines of the upper figure to an indefinite distance on the paper below it, as shewn by the lines 1, 2, 3, 4, 5; then proceed as before described in copying fig. 47 from the outline of fig. 46. The diagram will, it is hoped, be sufficiently explanatory of the method to be adopted, bearing in mind the lessons previously given. The pupil, in copying the various lessons given, should use a much larger scale than the limits of our pages will admit of. In the lower part of the figure 47 a is the principal bedroom, b the back bedroom, c the children's bedroom, d a small wardrobe, and e a small closet or bath room.

Example 48. To draw the plan of cellar in Jig. 48. Bisect ab in c, draw cd; corresponding to these, on the board draw lines ab, cd. From c measure to ab* Draw from these, at right angles to ab, to ee; parallel to ab

draw ef, and parallel to cd,fg. Parallel to e/draw gh; parallel to cd, hi. Join •»; the outline of the plan is thus obtained. Put in the thickness of the walls, the horizontal lines 11 first, the vertical 22 thereafter; and the central partition mn, with fire-jambs oo. Put in also the windows 88, and stairs, as in the drawing.

Example 49 is designed to shew the method of getting the position of the doors and windows in the front elevation, from the data afforded by the plan appe, fig. 49. The plan below represents the ground-plan of a row of four cottages, of which one-half is the counterpart of the other; we have therefore only shewn the one-half folly drawn. The line gf, dividing the four into equal parts, is prolonged to H; the line abr is drawn at right angles to this, and represents the ground-line: the distance of this above the plan will be decided on according to circumstances, size of paper, <fcc. The openings of doors a, b, and e, are each bisected, and from the points lines are drawn parallel to of, cutting the ground-line in the points u, v, and 3. In like manner, the windows c and d are bisected, and lines from the points drawn parallel to gf, cutting the ground-line in the points 1, 2.

The line 3 is the centre-line of end-door pr, the line 2 centre-line of window no, line 1 centre-line of second window hm; the line b, of the window de; c, offg. The sizes of doors, &c., being previously ascertained, and