On page 34, "opperations" was replaced with "operations".
On page 35, "meahanism" was replaced with "mechanism".
On page 39, "æorastation" was replaced with "ærostation".
On page 44, "horrizontally" was replaced with "horizontally".
On page 45, "air-ship" was replaced with "air ship".
On page 49, "anihilated" was replaced with "annihilated".
Sometimes, through the book, the author used the "℔" symbol and other times the author used "lbs."