Chicago : Engineering and Contracting Pub. Co. · leaf 502
sed in the early 70s for pavingpurposes was in most cases building brick ofordinary size and configuration. In 1872, how-ever, Ross Winans and Thomas Winans ofBaltimore, Md., laid an experimental pave-ment in which the blocks were cubical inshape. This pavement was in use for abouttwo years before… … Fig. 1—Section of Parsons Pavement. packed subfoundation of sand or gravel wasmade, and on this the blocks were laid. Sandwas then spread over the pavement and al-lowed to remain until the joints became packedand solid. A cross section of the pavement isconstructed under this invention as shown…
Buildings
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
