The Chinese wrote with characters instead of an alphabet. When writing with a Western alphabet of more than nine letters, there is a temptation to go on with words like eleven. With Chinese characters, ten is ten-blank and eleven is ten-one zero was left as a blank space: is 'four blank five' , This was much easier than inventing a new character for each number imagine having to memorize an enormous number of characters just to read the date! Having a decimal system from the beginning was a big advantage in making mathematical advances.
The first evidence of decimals in Europe is in a Spanish manuscript of CE. China has always been plagued with earthquakes and the government wanted to know where the economy would be interrupted. A seismograph was developed by the brilliant scientist, mathematician, and inventor Chang Heng whose works also show he envisaged the earth as a sphere with nine continents and introduced the crisscrossing grid of latitude and longitude.
His invention was noted in court records of the later Han Dynasty in CE the fascinating description is too long to reproduce here. It can be found on pgs. Modern seismographs only began development in The first version of the match was invented in CE by impoverished court ladies during a military siege. Hard pressed for tinder during the siege, they could otherwise not start fires for cooking, heating, etc.
The matches consisted of little sticks of pinewood impregnated with sulfur. There is no evidence of matches in Europe before Most people believe blood circulation was discovered by William Harvey in , but there are other recorded notations dating back to the writings of an Arab of Damascus, al-Nafis died Papyrus, the inner bark of the papyrus plant, is not true paper.
Paper is a sheet of sediment which results from the settling of a layer of disintegrated fibers from a watery solution onto a flat mold. Once the water is drained away, the deposited layer is removed and dried. The oldest surviving piece of paper in the world is made of hemp fibers, discovered in in a tomb near Xian, China, and dates from between the years and 87 BCE. The oldest paper with writing on it, also from China, is dated to CE and contains about two dozen characters.
Paper reached India in the seventh century and West Asia in the eighth. The Arabs sold paper to Europeans until manufacture in the West in the twelfth century. The tribal people of Central Asia discovered 'frozen-out wine' in their frigid climate in the third century CE. Hames, a pair of curved metal or sometimes wooden pieces lying on the horse collar of a horse harness, taking the pull from the traces.
How do you measure a horse hame? Measure the Length from top of the ratchet to the bottom of the hame. Line should be straight, not conforming to horses body.
When matching to a collar get hames that are one size bigger than the collar. When was the yoke invented? The first harnessed animal was an ox around BC. Oxen were used to drag things around with a harness. Big beasts of burden animals were recommended, because they were strong and tough. How did the horse collar improve farming in medieval Europe?
The horse collar allowed plowing to be done in half the time. That meant peasants achieved a huge increase in agricultural productivity.
Why is the white potato known as the Irish potato? What is a horse collar called? Does a mule push or pull a plow? Did the Chinese invent matches? Why is the horse collar important? What all did the Chinese invent? Fun Facts. Gunpowder, paper, printing, and the compass are sometimes called the Four Great Inventions of Ancient China.
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