Narragansett Machine Company, Bowling Catalog E
“ CONSTRUCTION. The beds rest on sleepers supported at their ends by sills running the entire length of the alleys. These may rest on a concrete, cement, or other solid floor, or on posts or piers set 8 ft. apart, or where the ground is firm and dry of a gravelly nature, on flat stones laid on the ground. The sills raise both sleepers and bed clear of the ground or cement, and as there is ample air space beneath them they are not liable to be affected by moisture which nearly always collects in confined places near the ground. ”
