Designated a National Historic Landmark
of New York City on 7/21/2003.
As a senior at Columbia University’s new Philosophy Hall in 1912, Edwin H. Armstrong worked in the second-floor Hartley Laboratories on his first of several major developments in wireless communication technologies. After graduation the promising young engineer was assigned a small laboratory to continue his work, and eventually became the head of the Hartley Laboratory. Even after a series of inventions made him not only wealthy, but one of the foremost inventors in wireless technology, Armstrong continued to use these second-floor laboratories and office facilities, as well as lecture rooms elsewhere in Philosophy Hall, to advance his work. The last of his major developments was the design of a wide-band frequency modulation (FM) system that achieved unprecedented fidelity and elimination of static. This revolutionary technology was met with resistance from those heavily invested in the well established amplitude modulation (AM) system. Unfortunately, Armstrong’s untimely death in 1954 prevented him from witnessing the eventual widespread dominance of his FM system.
1150 Amsterdam Avenue
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of Congress (LOC) Picture Collection
Unique in their scope and richness, the picture collections number
more than 14 million images. These include photographs, historical
prints, posters, cartoons, documentary drawings, fine prints, and
architectural and engineering designs. While international in scope,
the collections are particularly strong in materials documenting the
history of the United States and the lives, interests, and
achievements of the American people.
- National Park
Service - National Historic Landmarks Site
National Historic Landmarks (NHLs) are nationally significant
historic places designated by the Secretary of the Interior because
they possess exceptional value or quality in illustrating or
interpreting the heritage of the United States. Today, just over
2,500 historic places bear this national distinction. Working with
citizens throughout the nation, the National Historic Landmarks
Program draws upon the expertise of National Park Service staff who
guide the nomination process for new Landmarks and provide
assistance to existing Landmarks.
LOC Historic American Building Survey
The permanent collection of architectural, engineering and landscape
documentation at the Library of Congress consists of measured and
interpretive drawings, large-format black and white and color
photographs, written historical and descriptive data, and original
field notes. The collection captures the American experience through
approximately 40,000 recorded historic structures and sites, from
American Indian cliff dwellings at Mesa Verde to space-age
technology at Cape Canaveral.
LandmarkHunter.com is a database of historic or notable landmarks in
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Wikipedia - National Historic Landmarks in NYC
The free encyclopedia's directory of New York City's National
- Go Historic
Check out Go Historic, the encyclopedic travel guide to history, art
and architecture, including places, people, things, photos and