AWhat changed
The inspected specification isolates a hot working vessel from a cold condensation vessel and provides non-condensable-air removal, changing the inherited thermal arrangement.
Scientific scope
The inspected specification isolates a hot working vessel from a cold condensation vessel and provides non-condensable-air removal, changing the inherited thermal arrangement. The exact target is the first three thermal-design principles in the 1769 specification, inspected in its 1855 official reprint and crosschecked with museum records. A patent is not measured fuel efficiency or validation of every proposed mechanism. Newcomen's earlier engine, later manufacture and Boulton's business contribution remain separate; Watt did not invent steam power as a whole. The second model is not relabeled as the first.
Evidence
Source-linked, scoped account of the original work. The published scope states the scientific assumptions and remaining verification limits. WRS has not independently certified the full proof, experimental result or system benchmark.
Contributors
- James Watt · SCIENCE: Original source-listed scientific author of this scoped work; byline does not determine effort fractions.
- James Watt, Steam Engines: Specification No.913 of 1769, official London reprint 1855
- Powerhouse Collection, Specification of James Watt's separate condenser patent, Object 92/1
- Science Museum Group, Watt's second separate condenser,1765, Object 1876-1267
- Science Museum curator Ben Russell, James Watt and the separate condenser,5 January 2019
Provisional WRS assessment, edition 2026-10-16.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.
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