[16] With nickeliferous mattes, the green colour in the flame is reported by Heywood to persist throughout the whole process.
[17] The case of nickel may be here treated as exceptional. It is eliminated with difficulty, the nickel and copper tending to oxidise together on bessemerising.
Transcriber’s Notes:
The cover image was created by the transcriber, and is in the public domain.
The illustrations have been moved so that they do not break up paragraphs and so that they are next to the text they illustrate.
Inconsistent hyphenation has been left as printed, except “firebox” has been changed to “fire-box” in the Index to match the spelling in the main body of the book.
Typographical errors have been silently corrected but other variations in spelling and punctuation remain unaltered.
In some tables “Number” has been abbreviated to “No.”, “United States of America” to “U. S. A.” and trailing punctuation has been omitted to make the rows shorter.