Births on November 23

Valdemar Poulsen

Born on November 23, 1869

Valdemar Poulsen, Danish engineer (d. 1942)

Valdemar Poulsen (23 November 1869 – 23 July 1942) was a Danish engineer who made significant contributions to early radio technology. He developed a magnetic wire recorder called the telegraphone in 1898 and the first continuous wave radio transmitter, the Poulsen arc transmitter, in 1903, which was used in some of the first broadcasting stations until the early 1920s.

References

Valdemar Poulsen

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Events on 1869

6 Mar

Periodic table
Dmitri Mendeleev presents the first periodic table to the Russian Chemical Society.
28 Apr

First Transcontinental Railroad
Chinese and Irish laborers for the Central Pacific Railroad working on the First Transcontinental Railroad lay ten miles of track in one day, a feat which has never been matched.
25 Jul

Meiji Restoration
The Japanese daimyōs begin returning their land holdings to the emperor as part of the Meiji Restoration reforms. (Traditional Japanese Date: June 17, 1869).
17 Nov

Suez Canal
In Egypt, the Suez Canal, linking the Mediterranean Sea with the Red Sea, is inaugurated.
22 Nov

Clipper
In Dumbarton, Scotland, the clipper Cutty Sark is launched and is one of the last clippers ever built, and the only one still surviving today.

Births on November 23

Valdemar Poulsen

Born on November 23, 1869

References

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Events on 1869

Periodic table

First Transcontinental Railroad

Meiji Restoration

Suez Canal

Clipper