American Memory:  Technical summary

Image: Photo Montage

Collection Overview

Glass negatives and transparencies (together with about 300 colored photomechanical prints and about 300 cyanotype and albumen prints); the work of a number of photographers including the well known photographer William Henry Jackson, a co-founder of the company. Most images depict scenes in the United States (chiefly east of the Mississippi); together with some photographs of other nations in the Americas, Europe, and copies of paintings. Prominent subjects include buildings and views in towns and cities, colleges and universities, battleships and yachts, resorts, natural landmarks, and industry.
Source collection
Detroit Publishing Company Collection, Prints and Photographs Division.
LCCN 93-845504 [Link to catalog record (z39.50 query) will not work when main cataloging system is not available.] .
Technical features
Large number of varied scenes, image quality for most is moderate.
Original material formats
Number of original items
ca. 25,000 (about 600 from prints, reproduced in color)
Status of collection
Available online as of November 1997.
Public access
The Library is not aware of any restrictions that inhibit public access to this collection. See notes on rights and restrictions provided by the Library to users of this collection.

Aids to intellectual access

Type & granularity
MARC bibliographic records. Each bib. record describes a single item.
Sample bibliographic display in American Memory.
Linking to digital reproductions
Bibliographic record contains identifier used in filenames for all versions of image. Last character of filename indicates image type.

Digital reproductions

Total file-space for digital reproductions: 9 Gbytes

Photographs Archival image Service image Inline thumbnail Additional thumbnail
Marker Filename ends "u" Filename ends "r" Filename ends "t" Filename ends "t"
Tonal resolution (grayscale) 8 bit 8 bit 8 bit 8 bit
Tonal resolution (color) 24 bit 24 bit 8 bit 8 bit
Spatial resolution (approx) 550x440 pixels 550x440 pixels 150x100 pixels 150x100 pixels
Quantity (approx) 25,000 25,000 25,000 25,000
Sample Sample archival Sample service Sample thumbnail Sample thumbnail

Library of Congress contribution to Digital Libraries Initiative - Phase II [Site Map]
Collections available: [List] [Rights] [Samples] [Handover]
Technical notes: [Documents] [Images] [Maps] [Sound Recordings] [Motion Pictures]