PALRGOLAS. 139 
Pergolas. 
A pergola might be described as a series of connected arches, 
were it not for the fact that many pergolas are flat. 
There is nothing more beadtitot in a garden than a well- 
made and well-covered pergola. If space and material permit 
of its being made 50 yards long or more, a great array of lovely 
Roses may be grown on it; but even if short it may be made 
exceedingly attractive. 
FIG. 79.-END ELEVATION OF PERGOLA. 
Although there is such a thing as a metal pergola, a 
wooden structure is far more ornamental. Rough stems of 
various thicknesses are desirable. The base of the uprights 
should be creosoted, tarred, or charred, and they should be 
inserted about 4 feet apart, but a variation either way is not 
essential so long as the structure is made thoroughly strong 
and steady. The same consideration governs the depth at 
which the posts are put in: 2 to 24 feet is about right. 
A flat pergola is at least as expensive as an arched one, 
perhaps more so, because it is necessary to carry the posts, 
which are the most costly, up to a height of 8 feet If the 
