Guides
Original notes for English-speaking readers who want historic electricity and gas books without copyright risk.
Public-domain electricity books: what you can legally read and host
How U.S. public-domain rules apply to electricity textbooks, Library of Congress scans, and Google AdSense policy for reprint libraries.
The books that taught gas lighting
A guide to historic English books on illuminating gas, coal gas, and city lighting — and why they still matter.
Early electrical engineering textbooks in English
Where dynamo, wiring, and telegraph manuals came from, and how to judge whether a scan is public domain.