Letter from F. A. Dalburg certifying that Alex Bradford worked for Dalburg for two years in the Venezuelan oil fields. Dalburg describes Bradford's responsibilities on the job and praises his work ethic.

A price list for M-D Cut-In Connections, which are house connections built of Terra Cotta, Cement-Concrete, Cast Iron Soil and Water Pipe.

Pamphlet for the Atlas Mineral Products Co. M-D Cut-In Connection, with illustrations and photographs of the connection piece, a written description, advantages to its use, a case study of its use in Washington, and directions for the piece's use.

Map of the travels of George Washington in the Middle Atlantic region of the United States between 1732 and 1799, with insets of New York and the lower Hudson Valley, Mount Vernon, the tidewater region of Virginia, Philadelphia, and Boston. The map includes towns, colonial highways, historic or notable sites, bodies of water, and other geological features, with relief shown in hachures. Scale [ca. 1:2,502,720] (39.5 miles to the inch).

Report issued by the U.S. Bureau of Mines discussing the mine stations and safety cars used to reach miners in distress. As stated in the report, "the purpose, equipment, personnel, and construction of its safety cars" is presented. This report includes an illustration, and a map.

From Forward: "This paper gives the details of tests to determine the design of stoppings capable of withstanding a pressure, applied to either side, of 50 pounds per square inch, as required by section 104 (a) of the Operating Regulations to Govern Coal-Mining Methods on Leased Lands on the Public Domain, issued in 1921 and quoted on page 3."

From Introduction: "The methods of making the physical tests of explosives recorded here are based upon the results of more than 20 years of experience of the staff of the explosives division of the Bureau of Mines at the Pittsburgh testing station and at its successor, the Explosives Experiment Station, Bruceton, Pa. The methods are described in unusual detail to permit repetition that will duplicate, as nearly as possible, the precise manner in which they have been performed in the past and to reduce differences in technique to a minimum."

From Basis and Purpose of Report: "This report constitutes a large-size sample of these causes as taken from the Pennsylvania Department of Mine records. This report should therefore be a valuable experience record for all those who seek to prevent accidents with explosives, especially to all users of explosives."