The Societe Aerostatique, was the first aeronautical society, founded in 1852, in the city of Paris, France Continue reading
The French barber by the name of Jean-Jacques Perret invented in 1762, the Safety razor. Continue reading
In 1862, Paris, France, Justin Lathier introduced stamp albums for keeping stamp collections. Continue reading
Charlotte Guillard of Paris, France (She died in 1556), worked in the printing businesses with both of her husbands to which she outlived, afterwards she ran her own shop. Continue reading
Rayon, a synthetic fibre derived from cellulose was patented in 1884 by Count Louis-Marie-Hilaire Bernigaud de Chardonnet, who began producing it in a factory, commercially in 1892 at Besancon, France. Continue reading
The Rudimentary detail by researchers under Daniel Cohen in 1993 at the centre for the Study of Human Polymorphism in Paris, France, prepared the map of the human genome. Continue reading
Leonardo di ser Piero da Vinci (Italian: [leoˈnardo di ˌsɛr ˈpjɛːro da (v)ˈvintʃi] ( listen); 15 April 1452 – 2 May 1519), more commonly Leonardo da Vinci or simply Leonardo, was an Italian polymath whose areas of interest included invention, painting, sculpting, architecture, science, music, mathematics, engineering, literature, anatomy, geology, astronomy, botany, writing, history, and cartography. Continue reading
The contact lens were imagined and sketched his designs was the Italian artist and scientist Leonardo da Vinci, in 1508. Later in 1632 the French philosopher Rene Descartes conceived of corneal contact lens.
1508 / 1632
Leonardo da Vinci,
- Leonardo da Vinci – Wikipedia
Leonardo di ser Piero da Vinci (Italian: [leoˈnardo di ˌsɛr ˈpjɛːro da (v)ˈvintʃi] ( listen); 15 April 1452 – 2 May 1519), more commonly Leonardo da Vinci or simply Leonardo, was an Italian polymath whose areas of interest included invention, painting, sculpting, architecture, science, music, mathematics, engineering, literature, anatomy, geology, astronomy, botany, writing, history, and cartography.
- Da Vinci to Disposable: A History of Contact Lenses – 1800contacts.com
When you think about contact lenses, you probably don’t picture wearing a bowl of water on your head, but strangely enough, that’s how they began. In his 1508 “Codex of the Eye”, Italian inventor Leonardo da Vinci speculated that submerging the head in a bowl of water could alter vision.
- When Were Contact Lenses Invented? – AllAboutVision.com
Though contact lenses seem to be a recent phenomenon, the famous Italian architect, mathematician and inventor Leonardo da Vinci (1452-1519) produced the first known sketches (in 1508) that suggested the optics of the human eye could be altered by placing the cornea directly in contact with water.
- A Brief History of Contact Lenses
1508 Leonardo da Vinci illustrates the concept of contact lenses
- Contact lens – Wikipedia
A contact lens, or simply contact, is a thin lens placed directly on the surface of the eye. Contact lenses are considered medical devices and can be worn to correct vision, or for cosmetic or therapeutic reasons.
- The Evolution of Contact Lenses: From Da Vinci to Electronic Lenses …
As of 2012, there were 34 million Americans and 71 million people worldwide who wore the thin film inserts known as contact lenses over their eyes for some form of vision enhancement, according to the U.S. Environmental Protection Agency.
Paul-Louis Toussaint Heroult created the Electric Arc Furnace (Heated by a carbon arc at very high temp.) in France. At first it was used to melt scrap iron, then later in the Hall-Heroult process, the electrolytic refinement process of aluminum.
Name(s): Paul-Louis Toussaint Heroult
Occupation: French Metallurgist
- Electric arc furnace – Wikipedia
ndustrial arc furnaces range in size from small units of approximately one ton capacity (used in foundries for producing cast iron products) up to about 400 ton units used for secondary steelmaking.
- When was the electric arc furnace invented?
The German-born British inventor Sir William Siemens first demonstrated the arc furnace in 1879 at the Paris Exposition by melting iron in crucibles. In this furnace, horizontally placed carbon electrodes produced an electric arc above the container of metal.
- What does electric arc furnace do?
Steel scrap (or other ferrous material) is first tipped into the EAF from an overhead crane. A lid is then swung into position over the furnace. This lid contains electrodes which are lowered into the furnace. An electric current is passed through the electrodes to form an arc.
- Steel History From Iron Age to Electric Arc Furnaces – The Balance
The development of steel can be traced back 4000 years to the beginning of the Iron Age. Proving to be harder and stronger than bronze, which had previously been the most widely used metal, iron began to displace bronze in weaponry and tools.
- Electric Arc Furnace | Industrial Efficiency Technology & Measures
Electric Arc Furnaces (EAFs) are a central part of the production route that is an alternative to the dominant BF-BOF route. EAFs are used to produce carbon steels and alloy steels primarily by recycling ferrous scrap.
Gallic born latin poet by the name of Decimus Magnus Ausonious, described a stone cutting water powered mill in his lyric poem about the Mosella (Moselle) river in Gaul (now France), written circa 360. This water powered mill was cutting marble for the city of Treves. Mills of this type may have been used throughout the roman empire for several hundred years.
Circa 360 CE
Decimus Magnus Ausonious
- Hierapolis sawmill – Wikipedia
The Hierapolis sawmill is believed to be a Roman water-powered stone sawmill at Hierapolis, Asia Minor (modern-day Turkey). Dating to the second half of the 3rd century AD, the sawmill is considered the earliest known machine to combine a crank with a connecting rod, although neither clear ancient scripts nor engineering drawings were yet found to support this theory.
- Sawmill – Wikipedia
A sawmill or lumber mill is a facility where logs are cut into lumber. Before the invention of the sawmill, boards were made in various manual ways, either rived (split) and planed, hewn, or more often hand sawn by two men with a whipsaw, one above and another in a saw pit below.
- Roman Mills (Article) – Ancient History Encyclopedia
The Romans constructed mills for use in agriculture, mining and construction. Around the 3rd century BCE, the first mills were used to grind grain.
- 23 – Society for the History of Medieval Technology and Science
Showing a picture of the Villard saw (ill. 1) he described it as the earliest drawing we had of a semi-automatic tool (alluding to the feed back mechanism which advanced the timber to the blade) but not the earliest known such saw, one being recorded at Evreux in 1204.
- Ancient Roman Industrial Watermills – YouTube