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Molcajete used to grind spices Molcajete as a food container. Molcajetes are used to crush and grind spices, and to prepare salsas and guacamole.The rough surface of the basalt stone creates a superb grinding surface that maintains itself over time as tiny bubbles in the basalt are ground down, replenishing the textured surface.
National tournaments were held in the US and UK the year before World Championships through 2003–2004 but during the same year as of 2009 (see table, below). The determination of the US champion was changed for the 2003 tournament: winners of an Internet -based quiz challenge were selected to compete, rather than one state champion for each ...
The timeline of wars has been split up in the following periods: List of wars: before 1000; List of wars: 1000–1499; List of wars: 1500–1799; List of wars: 1800–1899; List of wars: 1900–1944; List of wars: 1945–1989; List of wars: 1990–2002; List of wars: 2003–present
1926: The Yagi-Uda Antenna or simply Yagi Antenna is invented by Shintaro Uda of Tohoku Imperial University, assisted by his colleague Hidetsugu Yagi. The Yagi Antenna was widely used during World War II. After the war they saw extensive development as home television antennas. 1926: Robert H. Goddard launches the first liquid fueled rocket.
Dynamite is invented by Alfred Nobel by mixing nitroglycerin with silica. It is the first safely manageable explosive stronger than gunpowder. [12] 1867 The use of ammonium nitrate in explosives is patented in Sweden. [13] 1875 Gelignite, the first plastic explosive, is invented by Alfred Nobel. [14] [13] 1884
Tridilosa: invented by civil engineer Heberto Castillo. Anti-graffiti coating (Deletum 3000): developed in the early 2000s at UNAM’s Applied Physics and Advanced Technology Centre in Querétaro Mexico. Earthquake Resistant Foundations: invented by engineer Manuel González Flores in 1945.
Old Japanese weapons and other military paraphernalia, c. 1892–95 A Gilbertese shark-toothed weapon (late 19th century). Major innovations in the history of weapons have included the adoption of different materials – from stone and wood to different metals, and modern synthetic materials such as plastics – and the developments of different weapon styles either to fit the terrain or to ...
Watches were worn during the Franco-Prussian War (1870–1871), and by the time of the Boer War (1899–1902), watches had been recognised as a valuable tool. [184] Early models were essentially standard pocket watches fitted to a leather strap, but, by the early 20th century, manufacturers began producing purpose-built wristwatches.