Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Charles Babbage
James Clerk Maxwell
James Ferguson
J. Willard Gibbs
Various
Alex. McAulay
Friedrich Dannemann
Earl of George Parker Macclesfield
Hermann Weyl
Mary Somerville
Mrs. Marcet and Thomas P. Jones
Thomas Wright
Marie Curie
Ernest Lebon
W. Mattieu Williams
Duchess of Margaret Cavendish Newcastle
Joseph Harris
Agnes Grainger Stewart
Claude Fayette Bragdon
Joseph Bertrand
Voltaire
Baron William Thomson Kelvin
Henry Stevens
John Tyndall
These books are free to read. Each is in the public domain in the United States; check your own country's rules before you copy or share one.