62 PRACTICAL LANDSCAPE GARDENING 



deep, the joints may be grouted with Portland cement mortar, using 

 three parts sand and one part cement. This grouting will prevent 

 the grass and weed growth. 



BRICK GUTTERS 



Brick gutters should always be laid on a four inch concrete base 

 and firmed with either bar sand or a cement grouting. 



A concave brick gutter, eighteen inches wide, should have a 

 slope of three inches to the center. If a curb is desired the brick 

 should be laid on end with the gutter finishing against it. 



SOD GUTTERS 



The most pleasing gutters are those of turf. Such gutters should 

 be conca^'e, with a slope toward the center of from one to two inches 

 to the foot. A gutter four feet wide should slope two inches to the 

 center. A gutter six feet wide should slope one inch to the foot, 

 giving a three inch depression as the minimum. The carrying ca- 

 pacity is increased by the increased breadth. 



In sod gutters inlets are necessary to carry off the surface water. 

 The number required will be governed by the area to be drained. 

 In rolling ground with large areas it is usually necessary to place 

 them every fifty feet. When building a driveway where sod gutters 

 have been adopted the drive surface should be finished even with 

 the soil so that the water will run oft" into the gutters. 



Turf gutters should be formed of tough sod cut from an old 

 pasture. Before laying the sod, the concave surface should be covered 

 with three or four inches of good soil and made true and even with 

 a template. This can easily be pulled along as the soil is deposited 

 and a uniform surface made for the reception of the sod. 



CARE OF SOD GUTTERS 



Every Spring the edge of the gutter should be tamped down 

 along the edge of the drive, as the frost will heave it higher than the 

 road metal. It should be rolled when the lawn is gone o\'er in early 

 Spring after the frost is out of the ground. 



C.\TCII B.-VSINS 



Catch basins (Fig. 50) may be constructed of concrete or brick, 

 whichever material is most convenient to the operation. The con- 

 crete construction is simple and should consist of a mi.xture of one 

 part Portland cement, three parts of sand, and four parts of crushed 



