The discovery of the radioconduction is a phenomenon which revolutionized the means of communication. It is at the origin of the development of the TSF (Télégraphie Sans Fil, or wireless telegraphy). As a member of the French Academy of Sciences (it gains vis-a-vis Marie Curie), Branly received international recognition. No more than about fifteen years separate the first wireless transmission across a few meters (1890) from the first transatlantic communication (Marconi, December 1901).
1890
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Image Credit:
Courtesy Wikipedia
Image Caption:
Edouard Branly
Era_date_from:
1890
2010
"The majestic Forth Bridge ... symbolises the tremendous achievements of Victorian engineers and the immense strides made in the technique of bridge design and construction since the dawn of the Railway Age..."
- Derrick Bennett, Bridges: Great Buildings of the World
YearAdded:
Image Credit:
Courtesy Flickr/Brain M Forbes (CC BY 2.0)
Image Caption:
The Forth Bridge became the longest bridge in the world when it was completed in 1890.
Era_date_from:
1890
1985
The structure has two segments: an East Channel bridge consisting of four 175-foot spans and three 240-foot spans crossing from Harrisburg to City Island; and a West Channel bridge, consisting of seven 175-foot spans crossing from City Island to Wormleysburg.
With 15 truss spans totaling 2,820 feet, the Walnut Street Bridge is the finest and largest surviving example of the standardized Phoenix wrought-iron truss bridges produced from 1884 to 1923.
YearAdded:
Image Credit:
Courtesy Flickr/rjonesProject856 (cc-by-2.0)
Image Caption:
Walnut Street Bridge
Era_date_from:
1890
1997
The bridge is 408 meters long and weighed approximately 1,500 metric tons when built. Originally supported by four columns, two more were added in later years to support the weight of heavier rail cars.
YearAdded:
Image Credit:
Courtesy Flickr/Rafael Retamal (CC BY-SA 2.0)
Image Caption:
Viaducto del Malleco
Era_date_from:
1890
1994
Innovations
The bridge is 408 meters long and weighed approximately 1,500 metric tons when built. Originally supported by four columns, two more were added in later years to support the weight of heavier rail cars.
In the late 19th century, the Malleco River represented the border between the…
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The structure has two segments: an East Channel bridge consisting of four 175-foot spans and three 240-foot spans crossing from Harrisburg to City Island; and a West Channel bridge, consisting of seven 175-foot spans crossing from City Island to Wormleysburg.
With 15 truss spans totaling…
Read More
"The majestic Forth Bridge ... symbolises the tremendous achievements of Victorian engineers and the immense strides made in the technique of bridge design and construction since the dawn of the Railway Age..."
- Derrick Bennett, Bridges: Great Buildings of the World
Throughout…
Read More
The discovery of the radioconduction is a phenomenon which revolutionized the means of communication. It is at the origin of the development of the TSF (Télégraphie Sans Fil, or wireless telegraphy). As a member of the French Academy of Sciences (it gains vis-a-vis Marie Curie), Branly received… Read More
