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3 days ago · 1900s. 1900: The first Zeppelin is designed by Theodor Kober. 1901: The first motorized cleaner using suction, a powered "vacuum cleaner", is patented independently by Hubert Cecil Booth and David T. Kenney. 1903: The first successful gas turbine is invented by Ægidius Elling. 1903: Édouard Bénédictus invents laminated glass.
1 day ago · While super-innovative, early laptops were cumbersome, limited in what they could do and outrageously expensive to boot, with some retailing for the equivalent of $17,000 in today's money.
3 days ago · Bronze Age, third phase in the development of material culture among the ancient peoples of Europe, Asia, and the Middle East, following the Paleolithic and Neolithic periods (Old Stone Age and New Stone Age, respectively). The term also denotes the first period in which metal was used.
- The Editors of Encyclopaedia Britannica
- When did the Bronze Age begin?The date at which the Bronze Age began varied with regions; in Greece and China, for instance, it began, before 3000 BCE, whereas in Britain, it di...
- What is the Chalcolithic period?The beginning of the Bronze Age is sometimes called the Chalcolithic (Copper-Stone) Age, referring to the initial use of pure copper. Scarce at fir...
- How did the Bronze Age end?From about 1000 BCE, the ability to heat and forge another metal, iron, brought the Bronze Age to an end, and led to the beginning of the Iron Age.
- When did the use of bronze increase?During the 2nd millennium, the use of true bronze greatly increased. The tin deposits at Cornwall, England, were much used and were responsible for...
3 days ago · Charles Francis Richter (1900–1985), U.S. – Richter magnitude scale; Adolph Rickenbacker (1886–1976), Switzerland – Electric guitar; Hyman George Rickover (1900–1986), U.S. – Nuclear submarine; Niklaus Riggenbach (1817–1899), Switzerland – Riggenbach rack railway system, Counter-pressure brake
4 days ago · A listing of the earliest patents issued by the U.S. Patent Office prior to 1836. Sometimes referred to as the "X" patents from the numbering system applied to them on a retrospective basis. This resource lists the patents in date order, with name and type of invention. Copies available to download here:
- Peter Bengston
- 2020
2 days ago · Fire. Arguably the first chemical reaction used in a controlled manner was fire. However, for millennia fire was seen simply as a mystical force that could transform one substance into another (burning wood, or boiling water) while producing heat and light. Fire affected many aspects of early societies.
4 days ago · Papermaking. Hemp wrapping paper, China, circa 100 BC. Papermaking has traditionally been traced to China about AD 105, when Cai Lun, an official attached to the Imperial court during the Han Dynasty (202 BC – AD 220), created a sheet of paper using mulberry and other bast fibres along with fishing net, old rags, and hemp waste.
