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Topeka, Kansas. Workmen of the test department of the Atchison, Topeka...

Public domain photograph - historical image of Kansas, United States, free to use, no copyright restrictions image - Picryl description

Kiowa, Kansas. At Atchison, Topeka and Santa Fe rail detector car. The...

Public domain photograph of 1930s-1940s US industrial development, Second World War, US war production, indusry, no copyright restrictions image - Picryl description

Fort Story cosat defense. Searching the sky for planes. Note the detec...

Picryl description: Public domain image of military training, armed forces fort, camp, exercise activity, free to use, no copyright restrictions.

Ashcroft's patent low water detector for preventing the explosion [......

This record contains unverified data from PGA shelflist card. Associated name on shelflist card: Hatch. Copyright deposit: Southern District Court of New York 1866.

Ashcroft's patent low water detector for preventing the explosion [......

This record contains unverified data from PGA shelflist card. Associated name on shelflist card: Hatch. Copyright deposit: Southern District Court of New York 1866.

Ashcroft's patent low water detector for preventing the explosion [......

This record contains unverified data from PGA shelflist card. Associated name on shelflist card: Hatch. Copyright deposit: Southern District Court of New York 1866.

Supplement to Dickerman's United States Treasury counterfeit detector....

Available also through the Library of Congress web site in two forms: as facsimile page images and as full text in SGML. Printed Ephemera Collection; Portfolio 239, Folder 5a.

Supplement to Dickerman's United States Treasury counterfeit detector....

Available also through the Library of Congress web site in two forms: as facsimile page images and as full text in SGML. Printed Ephemera Collection; Portfolio 239, Folder 5a.