Some new inventions, designs and ideas that were created in the 1780s include:
-1780 Bifocal glasses were invented by Benjamin Franklin
-1780 The circular saw was invented by Gervinus
-1784 The threshing machine was invented by Andrew Meikle
-1786 The steamboat was invented by John Fitch
-1785 The working parachute was invented by Blanchard
-1785 The power loom was invented by Edmund Cartwright
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<span>The one topical reason for the plague portrayed by ibn khaldun which visited eurasia between the time period of 1331 and 1347 is that the rats, bugs, microbes, military clash in Caffa, as well as financial exchange or economic trade interfaces between Afro-Eurasia.
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Answer:
In ancient times learned how to obtain copper from the ore by heating the rock to the metal melting point. They used to mould bronze objects by pouring the metal into stone shapes or ingots.
Explanation:
