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Fixed Dioptric light of the first order, vertical section
Summary
Illus. in: Plates Accompanying Report of the Secretary of the Treasury on the Improvements in the Lighthouse System and Collateral Aids to Navigation, detail of plate 4, (right).
On title page: Senate Document no. 488, 1st Session, 29th Congress, 1846.
On lower right: Lithy. by Ed. Weber & Co. Baltimore.
The collection/dataset uses media from the world's largest public domain source Picryl.com. It is made in two steps - first manually picked, and then, found semi-automatically, with aid of image recognition, it comprises of more than 5,000 images. Everything in the collection is in the public domain, so there is no limitation on the dataset usage - educational, scientific, or commercial.
Tags
Date
01/01/1846
Source
Library of Congress
Copyright info
No known restrictions on publication.
