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- Lean's_Engine_Reporter abstract "Lean's Engine Reporter was founded in 1810 to publicize the performances of different Cornish engines used for mine pumping in Cornwall. The first Reporter of Duty was Joel Lean. The Reporter, published monthly, gave, for each engine and its pumps, the number of strokes (measured by a counter kept in a locked box), and the amount of coal used. From this, and sizes of the pumps, the engine duty was found: this was the number of pounds of water raised one foot by a bushel of coal. Between 1810 and 1840 this reporting, and competition between engineers, raised the duty from around 20 million to 90 million pounds, a much higher efficiency than found in engines elsewhere at the same time. The improvements were an increase in the steam pressure used, full expansion to low pressure, and insulation to avoid heat loss. The Reporter continued to be published by various members of Lean's family until 1904.This open competition between engineers has been suggested as an early precursor of the free software movement, in which people engaged in collaborative development of technical knowledge.".
- Lean's_Engine_Reporter wikiPageID "6274513".
- Lean's_Engine_Reporter wikiPageRevisionID "514124989".
- Lean's_Engine_Reporter hasPhotoCollection Lean's_Engine_Reporter.
- Lean's_Engine_Reporter subject Category:Cornish_engines.
- Lean's_Engine_Reporter subject Category:Steam_engines.
- Lean's_Engine_Reporter type Artifact100021939.
- Lean's_Engine_Reporter type CornishEngines.
- Lean's_Engine_Reporter type Device103183080.
- Lean's_Engine_Reporter type Engine103287733.
- Lean's_Engine_Reporter type External-combustionEngine103307573.
- Lean's_Engine_Reporter type HeatEngine103507963.
- Lean's_Engine_Reporter type Instrumentality103575240.
- Lean's_Engine_Reporter type Machine103699975.
- Lean's_Engine_Reporter type Motor103789946.
- Lean's_Engine_Reporter type Object100002684.
- Lean's_Engine_Reporter type PhysicalEntity100001930.
- Lean's_Engine_Reporter type SteamEngine104309049.
- Lean's_Engine_Reporter type SteamEngines.
- Lean's_Engine_Reporter type Whole100003553.
- Lean's_Engine_Reporter comment "Lean's Engine Reporter was founded in 1810 to publicize the performances of different Cornish engines used for mine pumping in Cornwall. The first Reporter of Duty was Joel Lean. The Reporter, published monthly, gave, for each engine and its pumps, the number of strokes (measured by a counter kept in a locked box), and the amount of coal used. From this, and sizes of the pumps, the engine duty was found: this was the number of pounds of water raised one foot by a bushel of coal.".
- Lean's_Engine_Reporter label "Lean's Engine Reporter".
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- Lean's_Engine_Reporter sameAs Q6509427.
- Lean's_Engine_Reporter sameAs Q6509427.
- Lean's_Engine_Reporter sameAs Lean's_Engine_Reporter.
- Lean's_Engine_Reporter wasDerivedFrom Lean's_Engine_Reporter?oldid=514124989.
- Lean's_Engine_Reporter isPrimaryTopicOf Lean's_Engine_Reporter.