American Memory: Technical summary
URL for collection:
http://lcweb2.loc.gov/ammem/afctshtml/tshome.html
Collection Overview
- Description
-
Multi-format ethnographic field collection documenting the everyday life
of residents of Farm Security Administration migrant work camps in
central California in 1940 and 1941. This collection consists of audio
recordings, photographs, manuscript materials, publications, and ephemera
generated during two separate documentation trips supported by the
Archive of American Folk Song (now the Archive of Folk Culture, American
Folklife Center). Todd and Sonkin, both of the City College of New York
(currently the City College of the City University of New York), took
disc recording equipment supplied by the Archive of American Folk Song to
Arvin, Bakersfield, El Rio, Firebaugh, Porterville, Shafter, Thornton,
Visalia, Westley, and Yuba City, California. In these locales, the pair
documented dance tunes, cowboy songs, traditional ballads, square dance
and play party calls, camp council meetings, camp court proceedings,
conversations, storytelling sessions, and personal experience narratives
of the Dust Bowl refugees who inhabited the camps.
- Source collection
- The Charles L. Todd and Robert Sonkin Migrant Worker
Collection, American Folklife Center.
- Technical features
-
The documents in this collection relate to one another in multivalent
ways: the performers turn up in recordings, photos, letters, and reports;
the songs turn up in recordings and transcriptions; musical instruments
turn up in recordings, reports, photos, and drawings. The framing texts
for this collection -- the various explanatory texts and menus that form the
"home page family" at the web site -- are rich in pointers and guidance to
the materials proper.
- Original material formats
- Sound recordings (instantaneous disc recordings)
- Documents (page-image reproduction only)
- Documents (searchable text and image reproduction)
- Photographs
- Number of original items
-
714 -- (416 sound recordings, 275 documents, 23 photographs)
- Status of collection
- Available online.
- Public access
-
Restrictions associated with this collection will require grantees to
use only a subset of the sound recordings or address access management to
protect possible legal rights of third-parties. The Library does
not provide general public access to all items.
See notes on
rights and restrictions provided by the Library to users of this
collection.
Aids to intellectual access
- Type & granularity
- Bibliographic records (not in MARC format, derived from relational
database). Each bib. record describes a single item, which may be
represented by multiple files. In addition to bibliographic records for
individual documents, there are descriptions for groups of documents by
category on HTML pages.
- Linking to digital reproductions
- Bibliographic record contains identifier used in name of directory
that holds all associated files. Numbering system in place to link
searchable text to page images and illustration images.
Digital reproductions
Total file-space for digital reproductions:
2.8 Gbytes
Audio |
Service
audio |
Service audio |
Marker |
Filename extensions ".ram" and ".ra" |
Filename extension ".wav" |
Formats |
RealAudio |
WAVE |
Sample rate |
n/a |
22.05 kHz |
Word length |
n/a |
16 bit |
Channels |
mono |
mono |
Modem setting |
14.4 Kbps |
n/a |
File size |
30-400 Kbytes (.ra) 1 Kbyte (.ram -- for RealAudio metadata) |
1-12 Mbytes |
Quantity |
416 |
416 |
Sample |
Sample RealAudio |
Sample
WAV |
Documents page-images only |
Archival page images |
Service page images |
Marker |
Filename extension
".tif" |
Filename extension ".gif" |
Formats |
TIFF Group IV |
GIF |
Tonal
resolution |
1 bit |
4 bits |
Spatial
resolution
(approx) |
300 dpi |
50 dpi |
Quantity
(approx) |
608 pages |
608 pages |
File size |
66-165 Kbytes |
35-260 Kbytes |
Sample |
Sample
archival page-image |
Sample
service page-image |
Documents
(searchable text + page-images) |
Archival text file |
Page images |
Marker |
Filename extension
".sgm" |
Filename extension ".tif" |
Formats |
SGML |
TIFF Group IV |
DTD |
American Memory
(TEI conformant) |
n/a |
Tonal
resolution |
n/a |
1 bit |
Spatial
resolution
(approx) |
n/a |
300 dpi |
Quantity
(approx) |
121 |
250 |
File size |
2-165 Kbytes |
25-240 Kbytes |
Sample |
Sample SGML
document |
Sample
page-image |
Photographs |
Archival image
| Service image |
Inline thumbnail |
Marker |
Filename ends "u" |
Filename ends "r" |
Filename ends "t" |
Formats |
TIFF |
JPEG/JFIF |
GIF |
Tonal resolution |
8 bit (grayscale) |
8 bit |
8 bit |
Spatial resolution
(approx) |
300 dpi 2,500x3,000 pixels |
300 dpi |
150x100 pixels |
Quantity (approx) |
23 |
23 |
23 |
File size |
30-90 Kbytes |
8-25 Kbytes |
6-20 Kbytes |
Sample |
Sample archival |
Sample
service |
Sample thumbnail |
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[Images]
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[Sound recordings]
[Motion pictures]