. An encyclopædia of gardening; comprising the theory and practice of horticulture, floriculture, arboriculture, and landscape-gardening, including all the latest improvements; a general history of gardening in all countries; and a statistical view of its present state, with suggestions for its future progress, in the British Isles. Gardening. 376 SCIENCE OF GARDENING. Part II. tions. They may be all classed under three heads, that of transferring a straight line, a curved line, and a level line. 1926. Where a straight line is to be indicated among objects or inequalities not more than fifteen
. An encyclopædia of gardening; comprising the theory and practice of horticulture, floriculture, arboriculture, and landscape-gardening, including all the latest improvements; a general history of gardening in all countries; and a statistical view of its present state, with suggestions for its future progress, in the British Isles. Gardening. 376 SCIENCE OF GARDENING. Part II. tions. They may be all classed under three heads, that of transferring a straight line, a curved line, and a level line. 1926. Where a straight line is to be indicated among objects or inequalities not more than fifteen or twenty feet high, its plan or tract on the earth (Jig. 365. b) may be found by the use of poles, a few feet higher than the elevation of the obstructions, the director being placed on a step-ladder, or other elevation at one end. Where this method cannot be adopted on account of the height of the inequalities, the line must either be formed along the summits of these inequalities, which may be done if they are houses, hills, or trees ; or parallel lines (c, d, e) formed where practicable, and the mam line found by offsets (/, g, h) from those collateral lines at such places as are suitable. A third method, but one not always perfectly accurate, is to take a plan of the field or scene of operations, and on this to set out the proposed line; then by ascertaining its bearings and distances relatively to the obstructions, it may be transferred from the paper to the o-round. In carrying straight lines through woods, lanterns have been used ; but a much more correct method is to elevate poles above the surface of the wood. 365. 1927. Continuous lines may always be made perfectly straight, however irregular the surface, by following the same parallel as indicated by points of the compass; or by the shadow of the operator during sunshine. If the needle does not move, or the shadow of the spectator is always projected at the same angle to his course, the direction in which he
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Keywords: ., bookcentury1800, bookpublisherlondonprinte, booksubjectgardening
