Oh ddoyle thank you for this posting. I must buy the book. Mainly for the part on copper, brass and bronze. Since copper alloys are no longer of great commercial significance for their strength, it is hard to find good engineering information on them. Also his discussions of timber, well, I did not read them but think they would be of interest.
Yes, I have been a metallurgist a bit over a half-century now.
As far as gun barrels, I should tell you that it appears to be Most Politically Incorrect here to discuss properties of the steels used in contemporary American muzzle loader barrels.
If you wish to contact me privately we might have a discussion.