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Eaton, Warren S.

Collection Creator:
Morehouse, Harold E., 1894-1973  Search this
Container:
Box 4, Folder 17
Type:
Archival materials
Text
Collection Restrictions:
No restrictions on access
Collection Rights:
Permissions Requests
Collection Citation:
Harold E. Morehouse Flying Pioneers Biographies Collection, Acc. XXXX-0450, National Air and Space Museum, Smithsonian Institution.
See more items in:
Harold E. Morehouse Flying Pioneers Biographies collection
Harold E. Morehouse Flying Pioneers Biographies collection / Series 1.1: Biographies of Flying Pioneers 1.1
Archival Repository:
National Air and Space Museum Archives
EDAN-URL:
ead_component:sova-nasm-xxxx-0450-ref118
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Gallaudet, Edson F.

Collection Creator:
Morehouse, Harold E., 1894-1973  Search this
Container:
Box 5, Folder 5
Type:
Archival materials
Text
Collection Restrictions:
No restrictions on access
Collection Rights:
Permissions Requests
Collection Citation:
Harold E. Morehouse Flying Pioneers Biographies Collection, Acc. XXXX-0450, National Air and Space Museum, Smithsonian Institution.
See more items in:
Harold E. Morehouse Flying Pioneers Biographies collection
Harold E. Morehouse Flying Pioneers Biographies collection / Series 1.1: Biographies of Flying Pioneers 1.1
Archival Repository:
National Air and Space Museum Archives
EDAN-URL:
ead_component:sova-nasm-xxxx-0450-ref134
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Atwood, Harry N.

Collection Creator:
Morehouse, Harold E., 1894-1973  Search this
Container:
Box 1, Folder 7
Type:
Archival materials
Text
Collection Restrictions:
No restrictions on access
Collection Rights:
Permissions Requests
Collection Citation:
Harold E. Morehouse Flying Pioneers Biographies Collection, Acc. XXXX-0450, National Air and Space Museum, Smithsonian Institution.
See more items in:
Harold E. Morehouse Flying Pioneers Biographies collection
Harold E. Morehouse Flying Pioneers Biographies collection / Series 1.1: Biographies of Flying Pioneers 1.1
Archival Repository:
National Air and Space Museum Archives
EDAN-URL:
ead_component:sova-nasm-xxxx-0450-ref20
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  • View Atwood, Harry N. digital asset number 1
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Kimball, Wilbur R.

Collection Creator:
Morehouse, Harold E., 1894-1973  Search this
Container:
Box 7, Folder 19
Type:
Archival materials
Text
Collection Restrictions:
No restrictions on access
Collection Rights:
Permissions Requests
Collection Citation:
Harold E. Morehouse Flying Pioneers Biographies Collection, Acc. XXXX-0450, National Air and Space Museum, Smithsonian Institution.
See more items in:
Harold E. Morehouse Flying Pioneers Biographies collection
Harold E. Morehouse Flying Pioneers Biographies collection / Series 1.1: Biographies of Flying Pioneers 1.1
Archival Repository:
National Air and Space Museum Archives
EDAN-URL:
ead_component:sova-nasm-xxxx-0450-ref200
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Babcock, Verne C.

Collection Creator:
Morehouse, Harold E., 1894-1973  Search this
Container:
Box 1, Folder 8
Type:
Archival materials
Text
Collection Restrictions:
No restrictions on access
Collection Rights:
Permissions Requests
Collection Citation:
Harold E. Morehouse Flying Pioneers Biographies Collection, Acc. XXXX-0450, National Air and Space Museum, Smithsonian Institution.
See more items in:
Harold E. Morehouse Flying Pioneers Biographies collection
Harold E. Morehouse Flying Pioneers Biographies collection / Series 1.1: Biographies of Flying Pioneers 1.1
Archival Repository:
National Air and Space Museum Archives
EDAN-URL:
ead_component:sova-nasm-xxxx-0450-ref21
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  • View Babcock, Verne C. digital asset number 1

Latham, Bird M.

Collection Creator:
Morehouse, Harold E., 1894-1973  Search this
Container:
Box 8, Folder 11
Type:
Archival materials
Text
Collection Restrictions:
No restrictions on access
Collection Rights:
Permissions Requests
Collection Citation:
Harold E. Morehouse Flying Pioneers Biographies Collection, Acc. XXXX-0450, National Air and Space Museum, Smithsonian Institution.
See more items in:
Harold E. Morehouse Flying Pioneers Biographies collection
Harold E. Morehouse Flying Pioneers Biographies collection / Series 1.1: Biographies of Flying Pioneers 1.1
Archival Repository:
National Air and Space Museum Archives
EDAN-URL:
ead_component:sova-nasm-xxxx-0450-ref214
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Baldwin, Frederick W.

Collection Creator:
Morehouse, Harold E., 1894-1973  Search this
Container:
Box 1, Folder 10
Type:
Archival materials
Text
Collection Restrictions:
No restrictions on access
Collection Rights:
Permissions Requests
Collection Citation:
Harold E. Morehouse Flying Pioneers Biographies Collection, Acc. XXXX-0450, National Air and Space Museum, Smithsonian Institution.
See more items in:
Harold E. Morehouse Flying Pioneers Biographies collection
Harold E. Morehouse Flying Pioneers Biographies collection / Series 1.1: Biographies of Flying Pioneers 1.1
Archival Repository:
National Air and Space Museum Archives
EDAN-URL:
ead_component:sova-nasm-xxxx-0450-ref23
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  • View Baldwin, Frederick W. digital asset number 1
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Ovington, Earle L.

Collection Creator:
Morehouse, Harold E., 1894-1973  Search this
Container:
Box 10, Folder 9
Type:
Archival materials
Text
Collection Restrictions:
No restrictions on access
Collection Rights:
Permissions Requests
Collection Citation:
Harold E. Morehouse Flying Pioneers Biographies Collection, Acc. XXXX-0450, National Air and Space Museum, Smithsonian Institution.
See more items in:
Harold E. Morehouse Flying Pioneers Biographies collection
Harold E. Morehouse Flying Pioneers Biographies collection / Series 1.1: Biographies of Flying Pioneers 1.1
Archival Repository:
National Air and Space Museum Archives
EDAN-URL:
ead_component:sova-nasm-xxxx-0450-ref261
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Sommerville, William E.

Collection Creator:
Morehouse, Harold E., 1894-1973  Search this
Container:
Box 12, Folder 6
Type:
Archival materials
Text
Collection Restrictions:
No restrictions on access
Collection Rights:
Permissions Requests
Collection Citation:
Harold E. Morehouse Flying Pioneers Biographies Collection, Acc. XXXX-0450, National Air and Space Museum, Smithsonian Institution.
See more items in:
Harold E. Morehouse Flying Pioneers Biographies collection
Harold E. Morehouse Flying Pioneers Biographies collection / Series 1.1: Biographies of Flying Pioneers 1.1
Archival Repository:
National Air and Space Museum Archives
EDAN-URL:
ead_component:sova-nasm-xxxx-0450-ref309
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Sutro, Adolph G.

Collection Creator:
Morehouse, Harold E., 1894-1973  Search this
Container:
Box 12, Folder 18
Type:
Archival materials
Text
Collection Restrictions:
No restrictions on access
Collection Rights:
Permissions Requests
Collection Citation:
Harold E. Morehouse Flying Pioneers Biographies Collection, Acc. XXXX-0450, National Air and Space Museum, Smithsonian Institution.
See more items in:
Harold E. Morehouse Flying Pioneers Biographies collection
Harold E. Morehouse Flying Pioneers Biographies collection / Series 1.1: Biographies of Flying Pioneers 1.1
Archival Repository:
National Air and Space Museum Archives
EDAN-URL:
ead_component:sova-nasm-xxxx-0450-ref321
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Warner, Arthur P.

Collection Creator:
Morehouse, Harold E., 1894-1973  Search this
Container:
Box 13, Folder 15
Type:
Archival materials
Text
Collection Restrictions:
No restrictions on access
Collection Rights:
Permissions Requests
Collection Citation:
Harold E. Morehouse Flying Pioneers Biographies Collection, Acc. XXXX-0450, National Air and Space Museum, Smithsonian Institution.
See more items in:
Harold E. Morehouse Flying Pioneers Biographies collection
Harold E. Morehouse Flying Pioneers Biographies collection / Series 1.1: Biographies of Flying Pioneers 1.1
Archival Repository:
National Air and Space Museum Archives
EDAN-URL:
ead_component:sova-nasm-xxxx-0450-ref342
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Wild, Horace B.

Collection Creator:
Morehouse, Harold E., 1894-1973  Search this
Container:
Box 13, Folder 22
Type:
Archival materials
Text
Collection Restrictions:
No restrictions on access
Collection Rights:
Permissions Requests
Collection Citation:
Harold E. Morehouse Flying Pioneers Biographies Collection, Acc. XXXX-0450, National Air and Space Museum, Smithsonian Institution.
See more items in:
Harold E. Morehouse Flying Pioneers Biographies collection
Harold E. Morehouse Flying Pioneers Biographies collection / Series 1.1: Biographies of Flying Pioneers 1.1
Archival Repository:
National Air and Space Museum Archives
EDAN-URL:
ead_component:sova-nasm-xxxx-0450-ref349
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Beers, William C.

Collection Creator:
Morehouse, Harold E., 1894-1973  Search this
Container:
Box 1, Folder 24
Type:
Archival materials
Text
Collection Restrictions:
No restrictions on access
Collection Rights:
Permissions Requests
Collection Citation:
Harold E. Morehouse Flying Pioneers Biographies Collection, Acc. XXXX-0450, National Air and Space Museum, Smithsonian Institution.
See more items in:
Harold E. Morehouse Flying Pioneers Biographies collection
Harold E. Morehouse Flying Pioneers Biographies collection / Series 1.1: Biographies of Flying Pioneers 1.1
Archival Repository:
National Air and Space Museum Archives
EDAN-URL:
ead_component:sova-nasm-xxxx-0450-ref37
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Cooke, Weldon B.

Collection Creator:
Morehouse, Harold E., 1894-1973  Search this
Container:
Box 3, Folder 17
Type:
Archival materials
Text
Collection Restrictions:
No restrictions on access
Collection Rights:
Permissions Requests
Collection Citation:
Harold E. Morehouse Flying Pioneers Biographies Collection, Acc. XXXX-0450, National Air and Space Museum, Smithsonian Institution.
See more items in:
Harold E. Morehouse Flying Pioneers Biographies collection
Harold E. Morehouse Flying Pioneers Biographies collection / Series 1.1: Biographies of Flying Pioneers 1.1
Archival Repository:
National Air and Space Museum Archives
EDAN-URL:
ead_component:sova-nasm-xxxx-0450-ref93
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Designing Media: Martin Eberhard

Creator:
Cooper Hewitt, Smithsonian Design Museum  Search this
Type:
YouTube Videos
Uploaded:
2010-11-16T17:17:25.000Z
YouTube Category:
Education  Search this
Topic:
Design  Search this
See more by:
cooperhewitt
Data Source:
Cooper Hewitt, Smithsonian Design Museum
YouTube Channel:
cooperhewitt
EDAN-URL:
edanmdm:yt_DzU5_tpAOBw

Electricity the science of the nineteenth century : a sketch for general readers by E.M. Caillard ... ; with illustrations

Author:
Caillard, Emma Marie b. 1852  Search this
Bookbinder:
Mudie DSI  Search this
Donor:
Burndy Library DSI  Search this
Physical description:
[2], xiii, [1], 310, [2] pages illustrations 19 cm
Type:
Books
History
Date:
1891
Topic:
Electrical engineering  Search this
Electricity--History  Search this
Electricity  Search this
Call number:
QC527 .C13 1891
Data Source:
Smithsonian Libraries
EDAN-URL:
edanmdm:siris_sil_275560

Aufgaben aus dem Gebiete der Telegraphen-Technik von O. Canter, Ober-Post-Directions-Secretair ; mit 27 in den Text gedruckten Holzschnitten

Author:
Canter, Oscar  Search this
Former owner:
Wheatland, David P. DSI  Search this
Donor:
Burndy Library DSI  Search this
Physical description:
[8], 71, [1] pages illustrations 22 cm
Type:
Handbooks, manuals, etc
Handbooks and manuals
Date:
1878
Topic:
Electrical engineering  Search this
Telegraph  Search this
Call number:
TK5262 .C22 1878
Data Source:
Smithsonian Libraries
EDAN-URL:
edanmdm:siris_sil_276723

Der technische Telegraphendienst Unterrichtscursus in briefen für Telegraphen-, Post-, und Eisenbahn-Beamte von O. Canter ... ; mit 159 in den Text gedruckten Holzschnitten

Author:
Canter, Oscar  Search this
Former owner:
Wheatland, David P. DSI  Search this
Donor:
Burndy Library DSI  Search this
Physical description:
[6], 314 pages illustrations 22 cm
Type:
Handbooks, manuals, etc
Handbooks and manuals
Date:
1879
Topic:
Electrical engineering  Search this
Telegraph  Search this
Call number:
TK5262 .C22 1879
Data Source:
Smithsonian Libraries
EDAN-URL:
edanmdm:siris_sil_276724

Robert Ledley Papers

Creator:
Ledley, Robert S.  Search this
National Biomedical Research Foundation. Georgetown University  Search this
Names:
Automatic Computerized Transverse Axial Scanner  Search this
Computer-Assisted Tomography Scanner  Search this
National Biomedical Research Foundation. Georgetown University  Search this
Extent:
3 Cubic feet
Type:
Collection descriptions
Archival materials
Manuals
Patents
Photographs
Design drawings
Correspondence
Articles
Diagrams
Slides (photographs)
Notes
Motion pictures (visual works)
Albums
Date:
1972-1990
Summary:
The Robert Ledley Papers document the development of the first whole-body diagnostic imaging system, the Automatic Computerized Transverse Axial (ACTA) X-ray Scanner by Ledley in 1973. Also included is material relating to Ledley's company, Digital Science Information Corporation (DISCO), as well as the public and medical communities' reactions to the scanner.
Scope and Contents:
The Robert Ledley Papers document the development of the Automatic Computerized Transverse Axial (ACTA) X-ray Scanner, Ledley's company Digital Science Information Corporation (DISCO), as well as the public and medical communities' reactions to the scanner. The collection is arranged into nine series.

Series 1, ACTA Scanner I Schematics, 1973-1975; Series 2, ACTA Scanner I [Computer and Electronics], 1973; and Series 3, ACTA Scanner Tomograph Mechanics, 1973-1974 document the development and design of the ACTA scanner through drawings, notes, memoranda, and product information. More detailed information about these materials is located in the control file. All oversize drawings have been moved to flat storage for preservation concerns.

Series 4, ACTA Scanner Operating Instructions, 1975, is the operating manual created for the scanner used in Ledley's Georgetown lab.

Series 5, ACTA Articles, Clippings, and Press Releases, 1973-1979, is comprised of the aforementioned materials relating to the ACTA Scanner. Newspaper clippings illuminate the public's perception of the scanner, and scientific pieces highlight the medical community's reaction. Ledley's published articles on the scanner and related topics are included.

Series 6, Digital Information Science Corporation (DISCO) material, 1973-1981, documents Ledley's career and his company. A biographical sketch, list of articles, textbooks, and patents highlight Ledley's achievements. Invoices, receipts, contracts, and correspondence illuminate the financial situation at DISCO and the relationship between the company and Pfizer.

Series 7, Computer manuals, 1972-1975, documents the computer systems and software that were used with the ACTA Scanner.

Series 8, Photographic material, 1973-1978, includes an album of photographs depicting the ACTA Scanner and images of the scans it created. This album was disassembled due to preservation concerns. This series also includes a collection of slides featuring the scanner and related equipment in use and images of the scans it created. A detailed description of each photograph and slide is included in the control file.

Series 9, ACTA Scanner film, [1974?], is a 16mm narrated film describing the creation of the scanner, its components, the way they work, the scanner in use, and images of the scans produced.
Arrangement:
This collection is arranged into nine series.

Series 1, ACTA Scanner I Schematics, 1973-1975

Series 2, ACTA Scanner I [Computer and Electronics], 1973

Series 3, ACTA Scanner Tomograph Mechanics, 1973-1974

Series 4, ACTA Scanner Operating Instructions, 1975

Series 5, ACTA Articles, Clippings, and Press Releases, 1973-1979

Series 6, Digital Information Science Corporation (DISCO) material, 1973-1981, undated

Series 7, Computer manuals, 1972-1975

Series 8, Photographic material 1973-1978

Subseries 1, Photographs, 19731978

Subseries 2, Slides, 1974

Series 9, ACTA Scanner film [1974?]
Biographical / Historical:
Robert Steven Ledley was born in Flushing Meadows, New York in 1926. He received a D.D.S. degree from New York University College in 1948. While attending dental school, he simultaneously studied at Columbia University; he earned a M.A. in Theoretical Physics in 1949. He volunteered for the army and was sent to the U.S. Army Medical Field Service School in Fort Sam Houston, Texas.1 After completing his service, Ledley held a wide variety of research and academic positions in physics, electrical engineering, and medicine.

Ledley was a physicist within the External Control Group of the Electronic Computer Laboratory of the National Bureau of Standards from 1953-1954. He was an operations research analyst within the Strategic Division of the Operations Research Office at Johns Hopkins University from 1954-1956. Ledley went on to become an associate professor in the Department of Electrical Engineering at The George Washington University from 1956-1960 while also serving as a consultant mathematician at the National Bureau of Standards Data Processing Systems Division, 1957-1960. At this time, Ledley also worked part time at the National Research Council's National Academy of Sciences from 1957-1961. Ledley became the president of the National Biomedical Research Foundation in 1960, a position he still holds today. He was an instructor of pediatrics at the Johns Hopkins University School of Medicine from 1960-1963. He returned to The George Washington University's Department of Electrical Engineering in 1968 where he was a professor until 1970. He then became a professor in the Department of Physiology and Biophysics at the Georgetown University School of Medicine in 1970. In 1974, Ledley also became a professor in the Radiology Department at the Georgetown University Medical Center. In 1975, he became the director of the Medical Computing and Biophysics Division at Georgetown University Medical Center.

In 1972, the British company Electric and Musical Industries Limited (EMI) released a medical imaging machine for use on smaller areas of the body that were positioned under a water tank. In 1973, Ledley developed the Automatic Computerized Transverse Axial (ACTA) X-ray Scanner (US Patent #3,922,552). This machine was a whole-body diagnostic medical imaging system. He was awarded a grant from the National Institutes of Health for an engineering equipment project, but the money was never received due to budget cuts. Ledley looked elsewhere for funding. He consulted with Georgetown staff and discovered a neurosurgeon had asked to buy a head scanning machine from EMI. Ledley did not think the images in EMI's brochure appeared clear, and he offered to create a similar machine for half the price. Georgetown agreed to fund this project for $250,000. Ledley secured the services of a machinist at a local machine shop, an electronic engineer, and a programmer/mathematician to assist in the project.2 The ACTA Scanner debuted in February, 1974 and did not require the use of a water tank.

Following the creation of the ACTA Scanner, Ledley organized Digital Information Science Corporation (DISCO) in order to manufacture the system. DISCO began producing scanners as orders were received. Due to financial constraints, DISCO was forced to request $100,000 upon receipt of the order, $100,000 when the scanner was halfway completed, and the final $100,000 payment upon delivery3. In 1975, Pfizer purchased the rights to manufacture the ACTA Scanner from DISCO for $1.5 million.

Ledley is a Fellow of the American Association for the Advancement of Science and a senior member of the Institute of Electrical and Electronics Engineers. He has earned numerous awards and honors for his work. In 1997, he received the National Medal of Technology from President William Jefferson Clinton for his pioneering work on the whole-body CT diagnostic X-ray scanner. He also founded the Pattern Recognition Society and Computerized Tomography Society.

Sources

1 Ash, J., D. Sittig, and R. Ledley. "The Story Behind the Development of the First Whole-body Computerized Tomography Scanner as Told by Robert S. Ledley." Journal of the American Medical Informatics Association, 2006 Sep-Oct (2006), 465-469, http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1561796. (accessed June 24, 2009).

2 Ibid.

3 Ibid.
Separated Materials:
An ACTA Scanner and numerous accessories were donated to the Museum in 1984.
Provenance:
This collection was donated by Robert S. Ledley on September 18, 1984.
Restrictions:
The collection is open for research.
Rights:
Collection items available for reproduction, but the Archives Center makes no guarantees concerning intellectual property rights. Archives Center cost-recovery and use fees may apply when requesting reproductions.
Topic:
Medical innovations  Search this
Inventors  Search this
Inventions -- 20th century  Search this
Biology  Search this
History of science and technology  Search this
Digital Information Science Corporation  Search this
Diagnostic imaging  Search this
Medicine  Search this
Medical technology  Search this
Medical radiology  Search this
Whole body imaging  Search this
Tomography  Search this
Radiology  Search this
Genre/Form:
Manuals -- 1970-1990
Patents
Photographs
Design drawings
Correspondence -- 20th century
Articles -- 20th century
Diagrams
Slides (photographs) -- 1950-2000
Notes
Motion pictures (visual works) -- 20th century
Albums
Citation:
Robert Ledley Papers, 1972-1984, Archives Center, National Museum of American History, Smithsonian Institution
Identifier:
NMAH.AC.1135
See more items in:
Robert Ledley Papers
Archival Repository:
Archives Center, National Museum of American History
EDAN-URL:
ead_collection:sova-nmah-ac-1135
Online Media:

H289, Electric engine with President Harding in the cab

Collection Creator:
Maertz, J.F., Department Store (Milwaukee, Wis.).  Search this
Stanley-Brown, Joseph, 1858-1941  Search this
Keystone View Company  Search this
Rau, William H.  Search this
Container:
Box 7, Box 15
Type:
Archival materials
Graphic Materials
Collection Restrictions:
Collection open for research on site by appointment. Unprotected lantern slides and stereographs must be handled with gloves.
Collection Rights:
Collection items available for reproduction, but the Archives Center makes no guarantees concerning copyright restrictions. Other intellectual property rights may apply. Reproduction permission from Archives Center: reproduction fees may apply.
Collection Citation:
Division of Cultural History Lantern Slides and Stereographs, dates, Archives Center, National Museum of American History
See more items in:
Division of Cultural History Lantern Slides and Stereographs
Division of Cultural History Lantern Slides and Stereographs / Series 1: Keystone View Company Lantern Slides and Stereographs / 1.2: H-1 to H-300
Archival Repository:
Archives Center, National Museum of American History
EDAN-URL:
ead_component:sova-nmah-ac-0945-ref825

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