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Open Question

What exact date in 1712 did Thomas Newcomen's first practical steam engine begin operating?

Facts
Why It Is Open
Reliable histories agree the engine was erected in 1712 at the Conygree Coalworks near Dudley and Tipton in the Black Country, but no source consulted names the day or month it began pumping. 1
What Would Resolve This
A contemporary colliery record, correspondence, or documented primary account naming the specific day the engine started work. 1
Discipline Needed
History of technology 1
Question Kind
Dating 1
Question Status
Open 1
Reader Facing
Yes 1
Open Question

Reliable histories agree the engine was erected in 1712 at the Conygree Coalworks near Dudley and Tipton in the Black Country, but no source consulted names the day or month it began pumping.

What would resolve this A contemporary colliery record, correspondence, or documented primary account naming the specific day the engine started work.
OpenHistory of technologyWikipedia: Newcomen atmospheric engine
Connections

Question On

First Practical Steam Engine, Milestones
Source Wikipedia: Newcomen atmospheric engine
Sources
1. Wikipedia: Newcomen atmospheric engine
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