From a review of the book....
"In 1902 Thomas A. Edison's book "Telegraphy Self-Taught" was published by
Frederick J. Drake & Co. in Chicago. It was written with the philosophy
that "it is not the speed at which the letter is sounded that perplexes the
learner, but the rapid succession in which they follow each other." (This is
identical with the so-called Farnsworth method today.) The book was
accompanied with a small hand-crank-driven tape puller and a set of paper
tapes with the code characters punched in them. The tapes were designed to
start out with very wide spacing between characters, and as the student
progressed these spaces were reduced to normal. The goal was a practical
working speed of 25 wpm. The actual speeds, of course, would depend on how
fast the student turned the crank on the machine. "


de Keith VO1AE

BTW the book was bought from me by a collector in Italy, for the same price
as it's listed in at a US bookseller.