Especially is the former provision essential in cold climates, where, if water is allowed to remain in the substructure, the whole roadway is liable to become broken up and destroyed by frost and the wheels of vehicles.
"The Future of Road-making in America"
Archer Butler Hulbert
The masonry of the wall under these windows and the two lancets by which it is pierced indicate that advantage had been taken of an earlier building to form the substructure of the library.
"The Care of Books"
John Willis Clark
The style of its substructure shews that it was begun by his predecessor....
"The Care of Books"
John Willis Clark