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Bleachers vary in size from 10 feet (3 m) wide, seating 25, all the way to full stadiums that seat thousands and wrap around the entire field. As one example of their dimensions, Crystal Lake South High School in Illinois built some football bleachers that were about 50 feet (15 m) high. [4]
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
Bleachfields were a popular subject for Dutch painters in the 17th century. One of the stained glass windows made by Stephen Adam for the Maryhill Burgh Halls in 1878 shows linen bleachers at work. See also
New left field bleachers at Weeghman Park, 1915. Note the scoreboard has now been moved to center field. These bleachers occupied the former site of Eliza Hall. Before the start of the 1915 season, Weeghman made additional changes to the outfield. Gone were the jury-box bleachers in right-center field.
However, modern mathematicians generally believe that his axioms were highly incomplete, and that his definitions were not really used in his proofs. 300 BC: Finite geometric progressions are studied by Euclid in Ptolemaic Egypt. [43] 300 BC: Euclid proves the infinitude of primes. [44] 300 BC: Euclid proves the Fundamental Theorem of Arithmetic.
9th century – The sine quadrant, was invented by Muhammad ibn Musa al-Khwarizmi in the 9th century at the House of Wisdom in Baghdad. [3]: 128 The other types were the universal quadrant, the horary quadrant and the astrolabe quadrant. 10th century – sea-going junk ships built in China. Late 10th century – Kamal invented in Arab world.
The first wristwatches were made in the 16th century. Elizabeth I of England had made an inventory in 1572 of the watches she acquired, all of which were considered to be part of her jewellery collection. [174] The first pocketwatches were inaccurate, as their size precluded them from having sufficiently well-made moving parts. [175]
These scholars made their way to Gundeshapur in 529 following the closing of the academy by Emperor Justinian. They were engaged in medical sciences and initiated the first translation projects of medical texts. [61] The arrival of these medical practitioners from Edessa marks the beginning of the hospital and medical centre at Gundeshapur. [33]