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Manual of Gardeningof this size, or even half this size, it is rarely advisable to havethem perfectly flat and level. They should slope gradually away from the house; and when the lawn is seventy-five feet or more in width, it may be slightly crowning with good effect. A lawn should never be hollow,--that is, lower in the center than at the borders,--and broad lawns that are perfectly flat and level often appear to be hollow. A slope of one foot in twenty or thirty is none too much for a pleasant grade in lawns of some extent. In small places, the grading may be done by the eye, unless there are very particular conditions to meet. In large or difficult areas, it is well to have the place contoured by instruments. This is particularly desirable if the grading is to be done on contract. A basal or datum line is established, above or below which all surfaces are to be shaped at measured distances. Even in small yards, such a datum line is desirable for the best kind of work. _The terrace._ In places in which the natural slope is very perceptible, there is a tendency to terrace the lawn for the purpose of making the various parts or sections of it more or less level and plane. In nearly all cases, however, a terrace in a main lawn is objectionable. It cuts the lawn into two or more portions, and thereby makes it look smaller and spoils the effect of the picture. A terrace always obtrudes a hard and rigid line, and fastens the attention upon itself rather than upon the landscape. Terraces are also expensive to make and to keep in order; and a shabby terrace is always distracting. When formal effects are desired, their success depends, however, very largely on the rigidity of the lines and the care with which they are Next Page |
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