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A normal pickaxe handle is made of ash or hickory wood and is about 3 ft (91 cm) and weighs about 2.5 lb (1.1 kg). British Army pickaxe handles must, by regulation, be exactly 3 ft (91 cm) long, for use in measuring in the field. [citation needed] New variant designs are: With a plastic casing on the thick end. Made of carbon fibre [citation ...
He is best known for the invention of the crossword puzzle in 1913, when he was a resident of Cedar Grove, New Jersey. [ 5 ] Wynne created the page of puzzles for the "Fun" section of the Sunday edition of the New York World .
2004: First podcast, invented by Adam Curry and Dave Winer, is a program made available in digital format for download over the Internet and it usually features one or more recurring hosts engaged in a discussion about a particular topic or current event. [544] [545] [546] 2005: YouTube, the first popular video-streaming site, was founded
Fire-setting was one of the most effective rock breaking methods until 1867 when Alfred Nobel invented dynamite. [ 4 ] Traditional mining operations have created some of the largest handmade features on Earth, such as the Big Hole open pit mine in South Africa , which is claimed to be the largest hole on Earth excavated by hand.
An American-style 15×15 crossword grid layout. A crossword (or crossword puzzle) is a word game consisting of a grid of black and white squares, into which solvers enter words or phrases ("entries") crossing each other horizontally ("across") and vertically ("down") according to a set of clues. Each white square is typically filled with one ...
The larger Sunday crossword, which appears in The New York Times Magazine, is an icon in American culture; it is typically intended to be a "Wednesday or Thursday" in difficulty. [7] The standard daily crossword is 15 by 15 squares, while the Sunday crossword measures 21 by 21 squares.
A mattock has a shaft, typically made of wood, which is 3–4 ft (0.9–1.2 m) long. [1] The head consists of two ends, opposite each other and separated by a central eye. A mattock head typically weighs 3–7 lb (1.4–3.2 kg). [1] The form of the head determines the kind and uses of the mattock: [2]
The following articles cover the timeline of United States inventions: . Timeline of United States inventions (before 1890), before the turn of the century Timeline of United States inventions (1890–1945), before World War II