Topics Technology & Engineering

Black-and-white image of an ornate white building on a riverbank with trees behind it

A new book, more than 40 years in the making, about an iconic Philadelphia building

Water Bureau Newspaper Scrapbook, 1942-1952

Annual reports and other documents relating to Philadelphia’s water supply system, 1796-1992

Thomas Mill Covered Bridge on the Wissahickon

Thomas Mill Covered Bridge over Wissahickon Creek (Picturesque America)

Newspaper Clipping Scrapbooks of Frederick Graff Jr., Chief Engineer of the Philadelphia Water Department. Part 2: 1858-1871

Centre Square Water System

Centre Square Water Works, Frederick Graff, Sr. Plans, 1799

Benjamin Henry Latrobe, portrait by Filippo Costaggini, 1880

Centre Square Water Works, Latrobe Plans, 1799

Black-and-white image of a refinery with smokestacks emitting smoke

A Day in the Ma’sh – Oil Refinery

Color Diagram of Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia

DeLaval Beauty Shots 6

Electric Pump Installations at Lardner’s Point Pumping Station

Sewage collection and disposal plan

Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia, 1912