World Library  
Flag as Inappropriate
Email this Article

Lean's Engine Reporter

Article Id: WHEBN0006274513
Reproduction Date:

Title: Lean's Engine Reporter  
Author: World Heritage Encyclopedia
Language: English
Subject: Oscillating cylinder steam engine, Parallel motion, Thomas Savery, Thomas Newcomen, Hackworth valve gear
Publisher: World Heritage Encyclopedia

Lean's Engine Reporter

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[1] as an early precursor of the free software movement, in which people engaged in collaborative development of technical knowledge.


  1. ^ For example in Leadbeater, Charles. We-Think. Profile Books, 2008, citing papers by Alessandro Nuvolari et al


  • Nuvolari, Alessandro. "Lean's Engine Reporter and the development of the Cornish engine: A reappraisal". Transactions of the Newcomen Society, Vol 77, (2007), 167-189
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.