. The Book of gardening; a handbook of horticulture. Gardening; Floriculture. lO THE BOOK OF GARDENING. by inserting intermediate pegs at short distances from each other, say, every 14ft., or every 6ft. when the curves are short. The tracing of the alleys is most important, as it is in fact the reproduction on the ground of the design of the garden. The tracing of an avenue or of a straight alley, or, indeed, of any other straight line which may occur in the design of a garden, is such an easy operation, that it hardly requires any description. The extremities are fixed, and intermediate pegs
. The Book of gardening; a handbook of horticulture. Gardening; Floriculture. lO THE BOOK OF GARDENING. by inserting intermediate pegs at short distances from each other, say, every 14ft., or every 6ft. when the curves are short. The tracing of the alleys is most important, as it is in fact the reproduction on the ground of the design of the garden. The tracing of an avenue or of a straight alley, or, indeed, of any other straight line which may occur in the design of a garden, is such an easy operation, that it hardly requires any description. The extremities are fixed, and intermediate pegs inserted upright in the line at equal distances. The curved lines are more difficult to trace. Geometrical curves can be calculated and traced with invariable precision, but generally speaking they only occur in geometrical or formal gardens, or in flower-beds. In the tracing of gardens or parks, one has generally to deal with fantastic curves with long, sweeping lines, and contra-curves with ever-changing centres. Their execution requires great practice,. Fig. 3.—Tracing a Curve from a Fixed Point. as they are traced by sight, without the help of any instrument. Their outlines, so long as they are pleasing, do not require to be traced with mathematical precision. Though this could be obtained, it would entail considerable trouble and great loss of time without giving any appreciably better result. I will begin by demonstrating the principle employed in tracing a regular curve with only one centre, an operation which may be done in two different ways. In the first, shown at Fig. 3, the worker stands at and directs the operation without moving from that spot. The pegs are set at equal distances, and the apparent interval between them increases with the distance from the point a. The represented curve is divided into eight parts, and the apparent distance between each peg, as seen from (7, will be respectively cd for ce^ ef for eg^ gh for gi^ &c.; that is, the intervals see
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