This is free books online abut Architecture and Construction from 1855 and forward to abut 1922, you can learn how you build for example a door, window etc. For them how has old buildings is this side a Gould-mine.
I add the index page to the books as a PDF. and her is a link to index page http://chestofbooks.com/architecture/index.html
Have a fun reading!
/Robert
Thank you for the link Robert
Gaz
Thanks Robert,
Funrob29/Robert