Drawings of a hand cranked magneto generator

http://www.gutenberg.org/files/15617/15617-h/15617-h.htm

Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work
on Telephony Whole book is one html file. Has drawings of all the
early telephone equipment: receivers, transmitters, induction and
loading coils, electromechanical repeaters, magnetos, etc.. Tells how
the stuff works and how it was developed and improved. No modern
stuff.

Project Gutenberg has some James Clerk Maxwell, Faraday, and other
icons.

Project Gutenberg is a source of classic literature on line, from
Chaucer and Dumas, to Edger Rice Burroughs. Free to
download or read a page at a time.