Consists of blueprints showing schematics of bus equipment including change holders, operators' trays, mirror arms, and waste receptacles. Bus engines, seating and standing arrangements, and various bus models are also represented. Maps largely show different bus routes with an emphasis on Southern Pennsylvania Bus Co.'s operations in Chester, Pa. Of particular notoriety is a large 1929 map that details every street railway and bus line from Delaware City, De., to Upper Darby, Pa., and a large book of real estate plans showing street railway properties in and around Wilmington.

Series V, Subseries A, consists of material from the files of the General Accounting Office of Pennsylvania Water & Power Company, which PP&L absorbed in 1955. Among the material included are annual reports to regulatory commissions such as the Federal Power Commission and Securities and Exchange Commission for Penn Water and its affiliates, Consolidated Gas, Electric Light & Power Company of Baltimore, and the Safe Harbor Water Power Corporation. Accordingly, there are financial and funds statements, indentures, contracts, and other financial documents in the series related to each company. Notably, there are power contracts made with the cities of Coatesville, Lancaster, and York, Pennsylvania, and the Pennsylvania Railroad. Also included are Penn Water directors and stockholders' minutes leading up to the merger with PP&L, as well as financial data, financial effects, and legal factors related to the merger. There is also correspondence and cost computations regarding the Conowingo hydroelectric facility. Subseries B is a small amount of maps, surveys, and charts kept by Penn Water primarily used for the Holtwood development. Of note is a copy of Benjamin Henry Latrobe's 1801 survey of the Susquehanna River.

This series contains 261 items, daing from 1917 to 2003, with the majority from the 1920s to 1960s. Box 137-145

The Road Maps series consists entirely of printed road maps, and has been organized into four subseries:

Numbered Highways- US Route numbers, such as US 40 or US 66.

Named Highways- Highways nicknames such as the Skyline Drive or Pacific Highway.

Service Station- Maps distributed by gas companies such as Esso, Mobil or Shell.

Margolies Research Maps- These AAA maps are marked with the route and dates of research trips that Margolies took.

In 1900 there were only eight thousand cars on American Roads. By 1912 the number had skyrocketed to nearly one million vehicles, the result in part of Henry Ford’s Model T putting automobility within the financial grasp of more people.

Maps specifically printed to show automobile routes began appearing in the early 1900s. Following World War I, when the states and then the federal government created broad scale highway numbering schemes, road maps replaced guidebooks as the motorists’ main source of travel information.

Gulf Oil Company was one of the first companies to produce free road maps for its customers in 1913. Other oil companies soon joined the fray. From 1914 to 1964, nearly five billion road maps were given out to the American public. In the 1960s, 200 million maps were distributed annually.

Margolies refers to the oil-company road map as “one of the great commercial artifacts of twentieth-century America.”

Related items: Hitting the road : the art of the American road map / Douglas A. Yorke and John Margolies ; design by Eric Baker Design Associates. San Francisco, Calif. : Chronicle Books, c1996.

Pump and circumstance : glory days of the gas station / John Margolies. Boston : Little, Brown, c1993.