1800
Energy
Italy
Electric battery
Volta stacks zinc and copper discs to produce steady current.
Why it mattered
Continuous electricity, without which electrical science could not begin.
Industrial Age
1800
2 recorded milestones at this point in the record.
c. 1800
Technology
Britain and United States
Machine tools and interchangeable parts
Precision lathes and gauges made components fit without hand fitting.
Why it mattered
The foundation of mass production.
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