The only footnote has been renumbered and moved to
the end of its paragraph.
This file uses _underscores_ to indicate italic text.
Itemized changes from the original text:
On page 43, changed “and and” to “and”,
in “danger will be lost and the men”
On page 59, changed “floor-space” to “floor space”,
in “foundry floor space is littered with material”
On page 68, changed “charging-opening” to “charging, opening”,
in “Cupola, gate for charging, opening”
On page 77, changed “electro-magnet” to “electromagnet”,
in “if an electromagnet is employed”