Eli Whitney Armory, West of Whitney Avenue, Armory Street Vicinity, Ha...
Significance: Location of the musket factory of Eli Whitney, an important contributor to the development of the American System of Manufacturing. It was here that Whitney attempted a system of production that ... More
Eli Whitney Armory, West of Whitney Avenue, Armory Street Vicinity, Ha...
Significance: Location of the musket factory of Eli Whitney, an important contributor to the development of the American System of Manufacturing. It was here that Whitney attempted a system of production that ... More
Eli Whitney Armory, West of Whitney Avenue, Armory Street Vicinity, Ha...
Significance: Location of the musket factory of Eli Whitney, an important contributor to the development of the American System of Manufacturing. It was here that Whitney attempted a system of production that ... More
Eli Whitney Armory, West of Whitney Avenue, Armory Street Vicinity, Ha...
Significance: Location of the musket factory of Eli Whitney, an important contributor to the development of the American System of Manufacturing. It was here that Whitney attempted a system of production that ... More
Bulletins, from July 13, 1908 to September 28, 1908
Alexander Graham Bell Papers. Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description
Bulletins, from July 13, 1908 to September 28, 1908
Alexander Graham Bell Papers. Public domain scan of a technical diagram, plan, or drawing, free to use, no copyright restrictions - Picryl description.
Bulletins, from July 13, 1908 to September 28, 1908
Public domain photograph of laboratory, free to use, no copyright restrictions image - Picryl description
Bulletins, from January 4, 1909 to April 12, 1909
Public domain aerial photograph, no copyright restrictions image - Picryl description
Bulletins, from January 4, 1909 to April 12, 1909
Alexander Graham Bell Papers. Public domain aerial photograph, no copyright restrictions image - Picryl description
Bulletins, from January 4, 1909 to April 12, 1909
Alexander Graham Bell Papers. Public domain aerial photograph, no copyright restrictions image - Picryl description
Bulletins, from January 4, 1909 to April 12, 1909
Alexander Graham Bell Papers. Picryl description: Public domain image of a ship, navy, harbor, maritime photograph, 19th-20th century architecture, free to use, no copyright restrictions.
Bulletins, from January 4, 1909 to April 12, 1909
Public domain aerial photograph, no copyright restrictions image - Picryl description
MOORE, EDWARD B. COMMISSIONER OF PATENTS. AT DESK
A black and white photo of a man sitting at a desk. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description
Patents booklet motion picture, Emile Berliner radio broadcasting coll...
"H'oenshein" ? handwritten on front cover. Pencil notations p.1, p. 5 , p. 15. Informally-bound booklet of various gramophone patents, diagrams, and specifications, including Emile Berliner's patents: 372,786; ... More
Bulletins, from July 13, 1908 to September 28, 1908
Alexander Graham Bell Papers. Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description
Bulletins, from July 13, 1908 to September 28, 1908
Alexander Graham Bell Papers. Picryl description: Public domain image of an aircraft, aviation, air forces, free to use, no copyright restrictions.
Central Railroad of New Jersey, Newark Bay Lift Bridge, Spanning Newar...
Significance: The Newark Bay Bridge was constructed near the end of J.A.L. Waddell's career. He was an early proponent of the vertical lift bridge, designing and building his first in 1892. Waddell's landmark... More
Central Railroad of New Jersey, Newark Bay Lift Bridge, Spanning Newar...
Significance: The Newark Bay Bridge was constructed near the end of J.A.L. Waddell's career. He was an early proponent of the vertical lift bridge, designing and building his first in 1892. Waddell's landmark... More
Central Railroad of New Jersey, Newark Bay Lift Bridge, Spanning Newar...
Significance: The Newark Bay Bridge was constructed near the end of J.A.L. Waddell's career. He was an early proponent of the vertical lift bridge, designing and building his first in 1892. Waddell's landmark... More
New York, New Haven & Hartford Railroad, Niantic Bridge, Spanning Nian...
Significance: The Niantic Bridge is a through girder bridge and consists of a movable span and four approach spans on stone masonry piers. The movable span is a chain-driven Scherzer rolling lift bascule span ... More
Patent Office Building, Bounded by Seventh, Ninth, F & G Streets, Nort...
Public domain photograph of historic place in Washington DC, free to use, no copyright restrictions image - Picryl description
Patent Office Building, Bounded by Seventh, Ninth, F & G Streets, Nort...
Public domain photograph of building construction site, free to use, no copyright restrictions image - Picryl description
Patent Office Building, Bounded by Seventh, Ninth, F & G Streets, Nort...
Public domain photograph - historical image of Washington DC, United States, free to use, no copyright restrictions image - Picryl description
Browntown Cotton Gin, SC Route 341 between Johnsonville & Lake City, J...
Significance: Part of a unique collection of buildings known as Browntown, reflecting the self-sufficient way of life practiced by several generations of the Brown family during the 19th & early 20th centuries.... More
Browntown Cotton Gin, SC Route 341 between Johnsonville & Lake City, J...
Significance: Part of a unique collection of buildings known as Browntown, reflecting the self-sufficient way of life practiced by several generations of the Brown family during the 19th & early 20th centuries.... More
Delaware, Lackawanna & Western Railroad & Ferry Terminal, Ferry Slips ...
Significance: Throughout the early decades of the twentieth century, this terminal played a central role in commuter transportation in the metropolitan area. The ferry facilities are significant as an integral... More
State Bridge No. 0302150, Spanning Bass River at U.S. Route 9, New Gre...
Significance: This single-leaf, trunnion bascule bridge is a well-preserved example of a patented Strauss articulated underneath counterweight structure. It is significant for its use of chain-driven operating... More
West Main Street Bridge, Spanning South branch of Raritan River, Clint...
Significance: The Lowthorp Truss Bridge represents an early type of iron truss that dominated bridge construction from the 1850s to the 1870s. Fabricated in 1870 by William and Charles Cowin of Lambertville, N... More
West Main Street Bridge, Spanning South branch of Raritan River, Clint...
Significance: The Lowthorp Truss Bridge represents an early type of iron truss that dominated bridge construction from the 1850s to the 1870s. Fabricated in 1870 by William and Charles Cowin of Lambertville, N... More
West Main Street Bridge, Spanning South branch of Raritan River, Clint...
Significance: The Lowthorp Truss Bridge represents an early type of iron truss that dominated bridge construction from the 1850s to the 1870s. Fabricated in 1870 by William and Charles Cowin of Lambertville, N... More
West Main Street Bridge, Spanning South branch of Raritan River, Clint...
Significance: The Lowthorp Truss Bridge represents an early type of iron truss that dominated bridge construction from the 1850s to the 1870s. Fabricated in 1870 by William and Charles Cowin of Lambertville, N... More
West Main Street Bridge, Spanning South branch of Raritan River, Clint...
Significance: The Lowthorp Truss Bridge represents an early type of iron truss that dominated bridge construction from the 1850s to the 1870s. Fabricated in 1870 by William and Charles Cowin of Lambertville, N... More
New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Li...
Significance: The construction of South Station in 1896-98, involved the rerouting of several of the old lines from the west and south. The New York, New Haven & Hartford Railroad constructed a six-track rollin... More
New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Li...
Significance: The construction of South Station in 1896-98, involved the rerouting of several of the old lines from the west and south. The New York, New Haven & Hartford Railroad constructed a six-track rollin... More
New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Li...
Significance: The construction of South Station in 1896-98, involved the rerouting of several of the old lines from the west and south. The New York, New Haven & Hartford Railroad constructed a six-track rollin... More
Journal by Mabel Hubbard Bell, from July 20, 1883 to October 6, 1884
Picryl description: Public domain document related to trials and litigations, free to use, no copyright restrictions image.
Connellsville Coal & Coke Region, Connellsville, Fayette County, PA
See also HAER PA-259 for related documentation. Includes photographs & written data. Significance: Considered among the world's richest mineral deposits, the Pittsburgh seam of coal underlying portions of Fayet... More
Atherton Bridge, Spanning Nashua River on Bolton Road, Lancaster, Worc...
Significance: The Atherton Bridge is an example of a hybrid pony-truss that bears a similarity to the Post truss. The bridge is 72 feet long, 18 1/2 feet wide, and is comprised of eight panels. It rests on gr... More
Atherton Bridge, Spanning Nashua River on Bolton Road, Lancaster, Worc...
Significance: The Atherton Bridge is an example of a hybrid pony-truss that bears a similarity to the Post truss. The bridge is 72 feet long, 18 1/2 feet wide, and is comprised of eight panels. It rests on gr... More
Atherton Bridge, Spanning Nashua River on Bolton Road, Lancaster, Worc...
Significance: The Atherton Bridge is an example of a hybrid pony-truss that bears a similarity to the Post truss. The bridge is 72 feet long, 18 1/2 feet wide, and is comprised of eight panels. It rests on gr... More
Atherton Bridge, Spanning Nashua River on Bolton Road, Lancaster, Worc...
Significance: The Atherton Bridge is an example of a hybrid pony-truss that bears a similarity to the Post truss. The bridge is 72 feet long, 18 1/2 feet wide, and is comprised of eight panels. It rests on gr... More
Postcard, December 14, 1914 postcard
Alexander Graham Bell Papers. Picryl description: Public domain document related to trials and litigations, free to use, no copyright restrictions image.
Alexander Graham Bell papers - Album, undated
Alexander Graham Bell Papers. Picryl description: Public domain document related to trials and litigations, free to use, no copyright restrictions image.
Alexander Graham Bell papers - Album, undated
Picryl description: Public domain document related to trials and litigations, free to use, no copyright restrictions image.
Alexander Graham Bell papers - Album, undated
Alexander Graham Bell Papers. Picryl description: Public domain document related to trials and litigations, free to use, no copyright restrictions image.
Neshanic Station Lenticular Truss Bridge, State Route 567, spanning So...
Significance: Neshanic Station Lenticular Truss Bridge is significant because it was built by a prominent 19th century bridge building company; the lenticular truss, of which it is an example, is an unusual tru... More
Neshanic Station Lenticular Truss Bridge, State Route 567, spanning So...
Significance: Neshanic Station Lenticular Truss Bridge is significant because it was built by a prominent 19th century bridge building company; the lenticular truss, of which it is an example, is an unusual tru... More
Neshanic Station Lenticular Truss Bridge, State Route 567, spanning So...
Significance: Neshanic Station Lenticular Truss Bridge is significant because it was built by a prominent 19th century bridge building company; the lenticular truss, of which it is an example, is an unusual tru... More
Singer Manufacturing Company, 321 First Street, Elizabeth, Union Count...
Picryl description: Public domain photo of a factory, warehouse, commercial or industrial building, free to use, no copyright restrictions image.
Commercial Street Bridge, Spanning Purgatoire River on Commercial Stre...
Significance: After the turn of the century, the preferred alternative to the steel truss for short-span vehicular bridges was generally considered to the concrete arch. More solid under traffic and better resi... More
Pine Street Bridge, Pine Street (State Route 66) ,spanning Cumberland ...
Significance: The bridge derives its significance from its representative nature as an open spandrel deck concrete arch bridge and from its associations with the Luten Bridge Company and the historic Cumberland... More
Rehoboth Avenue Bridge, State Route 1A (Rehoboth Avenue) over Lewes & ...
Significance: A notable example of a Scherzer rolling lift bascule bridge and a typical example of 1920's bridge architecture. It is the second oldest bascule bridge in Delaware, out of the eleven that are sti... More
Watkins Mill, County Highway MM, Lawson, Ray County, MO
Significance: The Watkins (Woolen) Mill contains the finest collection of mid-19th century textile machinery in situ in North America and includes some of the most significant textile artifacts known to survive... More
Watkins Mill, County Highway MM, Lawson, Ray County, MO
Significance: The Watkins (Woolen) Mill contains the finest collection of mid-19th century textile machinery in situ in North America and includes some of the most significant textile artifacts known to survive... More
Watkins Mill, County Highway MM, Lawson, Ray County, MO
Significance: The Watkins (Woolen) Mill contains the finest collection of mid-19th century textile machinery in situ in North America and includes some of the most significant textile artifacts known to survive... More
Watkins Mill, County Highway MM, Lawson, Ray County, MO
Significance: The Watkins (Woolen) Mill contains the finest collection of mid-19th century textile machinery in situ in North America and includes some of the most significant textile artifacts known to survive... More
Richardson & Robbins Cannery, Kings Highway, Dover, Kent County, DE
Significance: Richardson & Robbins, founded in 1856, was the first cannery in the state of Delaware, and a pioneer in the American canning industry. Specializing in the processing and canning of food delicacie... More
New York, New Haven & Hartford Railroad, Groton Bridge, Spanning Thame...
Significance: The Groton Bridge is a Strauss heel trunnion bascule bridge. It is significant as part of the transportation link in the shoreline route of the New York, New Haven and Hartford Railroad, and as a... More
New York, New Haven & Hartford Railroad, Groton Bridge, Spanning Thame...
Significance: The Groton Bridge is a Strauss heel trunnion bascule bridge. It is significant as part of the transportation link in the shoreline route of the New York, New Haven and Hartford Railroad, and as a... More
Fisher-Fallgatter Mill, Waupaca, Waupaca County, WI
Significance: The Fisher-Fallgatter Mill stands as one of the few surviving flour mills in Wisconsin. Less than a century ago, hundreds of flour and gristmills were scattered across the state as settlers found ... More
Fisher-Fallgatter Mill, Waupaca, Waupaca County, WI
Significance: The Fisher-Fallgatter Mill stands as one of the few surviving flour mills in Wisconsin. Less than a century ago, hundreds of flour and gristmills were scattered across the state as settlers found ... More
Fisher-Fallgatter Mill, Waupaca, Waupaca County, WI
Significance: The Fisher-Fallgatter Mill stands as one of the few surviving flour mills in Wisconsin. Less than a century ago, hundreds of flour and gristmills were scattered across the state as settlers found ... More
Fink Through-Truss Bridge, Hunterdon County Government Complex (moved ...
Significance: At the time of its demolition in 1978, the Hamden bridge was one of only two Fink Through-Truss Bridges known to remain in the U.S. (The other is in Tuscarauras County, Ohio. See The Ohio Histor... More
Fink Through-Truss Bridge, Hunterdon County Government Complex (moved ...
Significance: At the time of its demolition in 1978, the Hamden bridge was one of only two Fink Through-Truss Bridges known to remain in the U.S. (The other is in Tuscarauras County, Ohio. See The Ohio Histor... More
Eli Whitney Armory, West of Whitney Avenue, Armory Street Vicinity, Ha...
Significance: Location of the musket factory of Eli Whitney, an important contributor to the development of the American System of Manufacturing. It was here that Whitney attempted a system of production that ... More
Bulletins, from July 13, 1908 to September 28, 1908
Alexander Graham Bell Papers. Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description
Bulletins, from July 13, 1908 to September 28, 1908
Alexander Graham Bell Papers. Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description
Bulletins, from July 13, 1908 to September 28, 1908
Alexander Graham Bell Papers. Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description
Bulletins, from July 13, 1908 to September 28, 1908
Alexander Graham Bell Papers. Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description
Bulletins, from January 4, 1909 to April 12, 1909
Public domain photo of a monument, historic place, free to use, no copyright restrictions image - Picryl description
Bulletins, from January 4, 1909 to April 12, 1909
Alexander Graham Bell Papers. Public domain aerial photograph, no copyright restrictions image - Picryl description Public domain photograph of a ship, free to use, no copyright restrictions image - Picryl description
Bulletins, from January 4, 1909 to April 12, 1909
Alexander Graham Bell Papers. Public domain aerial photograph, no copyright restrictions image - Picryl description
Bulletins, from January 4, 1909 to April 12, 1909
Picryl description: Public domain image of an early aircraft, aeronautics, free to use, no copyright restrictions.
Bulletins, from January 4, 1909 to April 12, 1909
Public domain scan of a technical diagram, plan, or drawing, free to use, no copyright restrictions - Picryl description.
Gramophone patents: U. S. Gramophone Co
Handwritten notations throughout. Correction page tipped in at beg. Patent 548, 623. Some blank pages between patents and facing diagrams. Gramophone patents bound informally together. Includes Berliner patents... More
Bulletins, from October 5, 1908 to December 28, 1908
Alexander Graham Bell Papers. Public domain aerial photograph, no copyright restrictions image - Picryl description Public domain photograph - New York, United States, free to use, no copyright restrictions i... More
Patents booklet motion picture, Emile Berliner radio broadcasting coll...
"H'oenshein" ? handwritten on front cover. Pencil notations p.1, p. 5 , p. 15. Informally-bound booklet of various gramophone patents, diagrams, and specifications, including Emile Berliner's patents: 372,786; ... More
Columbia Canal & Power Plant, Waterfront of Broad River, Columbia, Ric...
Significance: Designed to enable the navigation of the Broad and Congaree Rivers at their confluence in Columbia, the canal was completed in 1824 and enlarged in 1891; the 1891 portion of the canal is the signi... More
Bulletins, from October 5, 1908 to December 28, 1908
Alexander Graham Bell Papers. Public domain aerial photograph, no copyright restrictions image - Picryl description Public domain photograph of experimental aircraft, prototype, aviation design and developmen... More
Bulletins, from July 13, 1908 to September 28, 1908
Alexander Graham Bell Papers. Public domain scan of a technical diagram, plan, or drawing, free to use, no copyright restrictions - Picryl description.
Bulletins, from July 13, 1908 to September 28, 1908
Picryl description: Public domain image of an aircraft, aviation, air forces, free to use, no copyright restrictions.
Central Railroad of New Jersey, Newark Bay Lift Bridge, Spanning Newar...
Significance: The Newark Bay Bridge was constructed near the end of J.A.L. Waddell's career. He was an early proponent of the vertical lift bridge, designing and building his first in 1892. Waddell's landmark... More
Central Railroad of New Jersey, Newark Bay Lift Bridge, Spanning Newar...
Significance: The Newark Bay Bridge was constructed near the end of J.A.L. Waddell's career. He was an early proponent of the vertical lift bridge, designing and building his first in 1892. Waddell's landmark... More
Central Railroad of New Jersey, Newark Bay Lift Bridge, Spanning Newar...
Significance: The Newark Bay Bridge was constructed near the end of J.A.L. Waddell's career. He was an early proponent of the vertical lift bridge, designing and building his first in 1892. Waddell's landmark... More
Central Railroad of New Jersey, Newark Bay Lift Bridge, Spanning Newar...
Significance: The Newark Bay Bridge was constructed near the end of J.A.L. Waddell's career. He was an early proponent of the vertical lift bridge, designing and building his first in 1892. Waddell's landmark... More
Central Railroad of New Jersey, Newark Bay Lift Bridge, Spanning Newar...
Significance: The Newark Bay Bridge was constructed near the end of J.A.L. Waddell's career. He was an early proponent of the vertical lift bridge, designing and building his first in 1892. Waddell's landmark... More
Central Railroad of New Jersey, Newark Bay Lift Bridge, Spanning Newar...
Significance: The Newark Bay Bridge was constructed near the end of J.A.L. Waddell's career. He was an early proponent of the vertical lift bridge, designing and building his first in 1892. Waddell's landmark... More
Central Railroad of New Jersey, Newark Bay Lift Bridge, Spanning Newar...
Significance: The Newark Bay Bridge was constructed near the end of J.A.L. Waddell's career. He was an early proponent of the vertical lift bridge, designing and building his first in 1892. Waddell's landmark... More
Central Railroad of New Jersey, Newark Bay Lift Bridge, Spanning Newar...
Significance: The Newark Bay Bridge was constructed near the end of J.A.L. Waddell's career. He was an early proponent of the vertical lift bridge, designing and building his first in 1892. Waddell's landmark... More
New York, New Haven & Hartford Railroad, Niantic Bridge, Spanning Nian...
Significance: The Niantic Bridge is a through girder bridge and consists of a movable span and four approach spans on stone masonry piers. The movable span is a chain-driven Scherzer rolling lift bascule span ... More
Patent Office Building, Bounded by Seventh, Ninth, F & G Streets, Nort...
Picryl description: Public domain image of a historical landmark building, courtyard, 17th, 18th, 19th-century architecture, free to use, no copyright restrictions.
Patent Office Building, Bounded by Seventh, Ninth, F & G Streets, Nort...
Public domain photograph of historic place in Washington DC, free to use, no copyright restrictions image - Picryl description
Patent Office Building, Bounded by Seventh, Ninth, F & G Streets, Nort...
Public domain photograph of stairs, steps, free to use, no copyright restrictions image - Picryl description
Patent Office Building, Bounded by Seventh, Ninth, F & G Streets, Nort...
Picryl description: Public domain image of a fountain, historic landmark, classical or neoclassical architecture, free to use, no copyright restrictions.
Waddell "A" Truss Bridge, Spanning Lin Branch Creek, Trimble, Clinton ...
The address was changed to reflect that the bridge was moved from its original location (Spanning Linn Branch Creek, Trimble vicinity, Clinton County, Missouri) to Parkville, Missouri, in 1987. (March 2016) Si... More
Waddell "A" Truss Bridge, Spanning Lin Branch Creek, Trimble, Clinton ...
The address was changed to reflect that the bridge was moved from its original location (Spanning Linn Branch Creek, Trimble vicinity, Clinton County, Missouri) to Parkville, Missouri, in 1987. (March 2016) Si... More