Transcriber’s Notes:
- Page 28, “metalic” changed to “metallic” (“its reduction to the metallic”).
- Page 42, “partion” changed to “partition” (“the right hand partition for”).
- Page 60, “sprin” changed to “spring” (“keyboard keybar spring F”).
- Page 60, “apiece” changed to “a piece” (“soldering a piece on the bottom”).
- Page 70, “groves” changed to “grooves” (“or the small grooves which”).
- Page 79, title “Keyboards.” added.
Figures 12 and 13, and 29 and 30 appear in an inverse order in the original. This has been preserved.
On page 78, some characters may not render correctly with some machine/format combinations. An illustration of the section of the page in question is included here:
Original images of this book can be found [here].