Name any two discoveries during Industrial Revolution in England.?

Question

# Need for the above inventions in 18th and 19th century.
# Their inventors and their story.
# Technique/Science behind the inventions.(principle)
# Evolution(changes) in the inventions in modern time.(eg; Telephone)
# Do we use any of these today?How and why?
#According to you which was the most important invention.Why?

Answer 1

Steam power then electricity
Cast Iron then Steel
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