Telegraphy is the long-distance transmission of messages where the sender uses symbolic codes, known to the recipient, rather than a physical exchange of an object bearing the message.
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Cotton Gin
invented by Eli Whitney
A cotton gin – meaning “cotton engine” – is a machine that…
Vaccine
invented by Edward Jenner
Edward Jenner develops the first successful vaccine, the smallpox vaccine.
Flying shuttle
invented by John kay
The flying shuttle was one of the key developments in the industrialization of…
Weighing scale
invented by Richard Salter
A scale or balance is a device to measure weight or mass. These are also known…
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