Simple patterns (fig. 8.), consisting of straight lines, need only to be measured, and pieces of string stretched from pegs put in at the proper distances, so as to form straight lines, oblongs, squares, triangles, or diamonds. If a circle is to be traced, it is done by getting a piece of string half the length of the diameter of the circle, with a piece of stick tied to each end. One stick is then driven into the ground in the centre of the circle, and a line is traced with a stick at the other extremity of the string which is drawn out quite tight. An oval is made by tracing two circles, the circumscribing line of one of which just touches the centre of the other; short lines are afterwards made at the top and bottom, and the central lines are obliterated. A square only requires a peg at each corner, with a chalked string drawn from peg to peg; and an oblong, or parallelogram, is made by joining two common squares, and taking off the corners if required. [Illustration: Fig. 9.] A heart-shaped pattern (fig. 9.) is made by drawing a straight line from _a_ to _b_, and then fixing a peg with a string tied to it, half the length of the straight line, and another peg at the end, exactly in the middle of the line, and drawing a half-circle with it; then taking a peg with a string half the length of the other, and another peg tied to the end, and tracing with it the smaller half-circles, _c_ and _d_. With the same strings and pegs you may easily trace, or rather have traced, figs. 10 and 11. Even the latter, which appears at first sight a very difficult figure to form on the ground, will be just as easily traced as the others. You will observe, that in all these figures the straight line is only to serve as a guide to show the proper places for fixing the pegs; and that it is only to be formed by a piece of string stretched by pegs from one end of the figure to the other, which is to be removed as soon as the figure is sketched, and which is not to be traced on the ground at all. [Illustration: Fig. 10.] [Illustration: Fig. 11.] With the aid of these figures, and the pegs and strings, several very complicated gardens may be formed; for instance, that shown in fig. 12. This garden is composed of a bed in the centre for a tree rose with a circle of dwarf roses; a gravel walk surrounds these; and there are five heart-shaped beds, which may be planted with Scarlet Pelargoniums, yellow Calceolarias, Petunias white and purple, and tall yellow Mimulus; and the crescent-shaped beds, which are on grass, may all be planted with different kinds of Verbenas. This plan is also a good design for a rosery, the roses to be planted in the beds, and in the half crescents which must be on grass, with gravel walks between the grass plots. [Illustration: Fig. 12. _Plan for a Flower-Garden._]