Mathematical floor plan mapping the structural dimensions, metric volume, and internal furniture arrangements for a cell in Philadelphia 插畫檔

This technical architectural engraving illustrates a detailed top-down floor plan of a standard confinement unit within a penal facility. Created during the nineteenth century, these engineering layouts represent the internationally recognized reformatory architecture and cellular isolation models implemented within the prison framework of the United States. The blueprint uses an alphabetical legend to precisely outline the positioning of everyday inmate furnishings, cataloging a central work table, a stool, a bedstead, and a small buffet cabinet, alongside integrated structural calculations for exact surface area, total air volume, gas illumination lines, heating devices, and reinforced dual-door entry systems.