For anyone looking for a detailed reference handbook on the characteristics of wood, have a look at this site . .
If you click on the “View PDF” link, you can download the complete 509 page publication. The file is 12.9 Mb, and it is fully searchable so finding whatever you want to learn about is easy. You can also purchase either a hardcopy or CD version. Interesting site. Enjoy.
-- John, British Columbia, Canada