⇒ The MacTutor History of Mathematics Archive
Weisbach, Julius, Principles of the mechanics of machinery and engineering, Vol.1 Theoretical mechanics, Edited by Walter R. Johnson, First American Edition, Lea and Blanchard, Philadelphia 1848.
⇒ download from Kinematic Models for Design Digital Library
Weisbach, Julius, Principles of the mechanics of machinery and engineering, Vol.2 Applied mechanics, Edited by Walter R. Johnson, First American Edition, Lea and Blanchard, Philadelphia 1848.
⇒ download from Kinematic Models for Design Digital Library