File:Apparatus for investigating the Phase Rule of an iron-nitrogen system 9p290969x.tif
Original file (3,226 × 2,553 pixels, file size: 31.42 MB, MIME type: image/tiff)
Captions
English: Apparatus for investigating the Phase Rule of an iron-nitrogen system ( ) | |||||||||||||||||||||
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Photographer |
UnknownUnknown |
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Title |
English: Apparatus for investigating the Phase Rule of an iron-nitrogen system |
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Description |
English: Apparatus for investigating the Phase Rule of an iron-nitrogen system
General view of an apparatus used to investigate the Phase Rule in an iron-nitrogen system at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. First proposed by Josiah Willard Gibbs, the Phase Rule provides the theoretical foundation for characterizing the chemical state of a system and predicting the number of stable phases (defined as any physically separable material in the system) that may exist in equilibrium as a function of physical conditions such as pressure and temperature. The Fixed Nitrogen Research Laboratory (F.N.R.L.) was established at American University in 1919 under the directorship of Arthur B. Lamb. Initially part of the War Department, the F.N.R.L. was the successor to several wartime initiatives to develop a secure domestic supply of nitrate compounds necessary for the manufacture of explosives during World War I. With a staff of about 110 individuals, including 35 to 50 chemists, the F.N.R.L. focused on the manufacture, production, and development of products of atmospheric nitrogen, including munitions and fertilizers. |
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Date |
8 January 1930 date QS:P571,+1930-01-08T00:00:00Z/11 |
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Medium | Print, Photographic , Original, Negative | ||||||||||||||||||||
Dimensions |
height: 6.2 in (15.8 cm); width: 7.7 in (19.6 cm) dimensions QS:P2048,6.25U218593 dimensions QS:P2049,7.75U218593 |
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Collection |
institution QS:P195,Q5090408 |
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Accession number | |||||||||||||||||||||
Object history | Travis Hignett Collection. The images are from the United States Department of Agriculture (U.S.D.A.) Fixed Nitrogen Research Laboratory (F.N.R.L.) and date from the 1920s-1950s. Many of the images are mounted on scrapbook pages and were originally in scrapbook albums. | ||||||||||||||||||||
Credit line | Gift of Travis Hignett, Science History Institute. | ||||||||||||||||||||
Notes | Image downloaded with permission from the Science History Institute, as part of the Wikipedian in Residence initiative. | ||||||||||||||||||||
Source | https://digital.sciencehistory.org/works/8336h1967 | ||||||||||||||||||||
Permission (Reusing this file) |
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current | 18:46, 9 October 2019 | 3,226 × 2,553 (31.42 MB) | Mary Mark Ockerbloom (talk | contribs) | User created page with UploadWizard |
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Metadata
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Image title | HyperFocal: 0 |
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Camera manufacturer | Phase One |
Camera model | IQ3 80MP |
Exposure time | 40,370/2,422,199 sec (0.016666673547467) |
ISO speed rating | 50 |
Date and time of data generation | 11:14, 5 October 2016 |
Width | 3,226 px |
Height | 2,553 px |
Compression scheme | Uncompressed |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 4 |
Number of rows per strip | 10 |
Horizontal resolution | 400 dpi |
Vertical resolution | 400 dpi |
Data arrangement | chunky format |
Software used | Capture One 9 Macintosh |
Exposure Program | Manual |
Exif version | 2.2 |
Date and time of digitizing | 11:14, 5 October 2016 |
APEX shutter speed | 5.9068899992962 |
Light source | Other light source |
Focal plane X resolution | 1,923.0769230769 |
Focal plane Y resolution | 1,923.0769230769 |
Focal plane resolution unit | 3 |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
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