Snapshots of the Past

Naval Observatory, [Washington, D.C.], Longitude houses for determining difference in ti – Vintage Wall Art

Naval Observatory, [Washington, D.C.], Longitude houses for determining difference in ti, [between 1910 and 1926] — historic photograph
Naval Observatory, [Washington, D.C.], Longitude houses for determining difference in ti, [between 1910 and 1926]. Historic photograph from the Washington DC collection.

(Originally scanned by the Library of Congress. Each image is professionally and digitally cleaned of artifacts such as color bars and extra borders prior to printing.)

Description

This historic photograph of Naval Observatory, [Washington, D.C.], Longitude houses for determining difference in ti brings a moment of history to your wall. An authentic image from the Library of Congress, it carries the weight of the real historical record.

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Naval Observatory, [Washington, D.C.], Longitude houses for determining difference in ti

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Small detached buildings called longitude houses stood on the grounds of the Naval Observatory in Washington, where they were used to compare local time with the time kept at other observatories. Clock and telegraph signals exchanged between stations let astronomers work out the difference in longitude between places, a task essential to accurate charts and navigation. The National Photo Company, a commercial studio active in the early twentieth century, made this glass negative sometime between 1910 and 1926, recording a working scientific site in the nation's capital during that era.

Created / published[between 1910 and 1926]
Medium1 negative : glass ; 8 x 6 in.
GenreGlass negatives.
NotesTitle from unverified data provided by the National Photo Company on the negative or negative sleeve. Date from negatives in same range. Copy. Gift; Herbert A. French; 1947. This glass negative might show streaks and other blemishes resulting from a natural deterioration in the original coatings. Temp. note: Batch seven.
SubjectsUnited States--District of Columbia--Washington (D.C.)
SourceLibrary of Congress, National Photo Company Collection
Original scan6,975 × 5,399 px · prints to 23 × 18 in at 300 dpi
ReferenceAMZ-SOTP-NPC-261843

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