I have been looking through some old issues of Popular Science Magazine online. I thought some others might find the article in the link below interesting. It describes a way to dye a living tree a few weeks before harvesting. It would also be interesting to know if any of you have any knowledge of this technique.
You have to wait just a little for the cover to download, then click on contents and scroll down to the bottom article on page 37.
I hope you will bookmark the link, as all the old issues going back to 1918 (I think) are there right up to modern days. A lot of interesting stuff and the older issues also includes a regular monthly woodworking project.
I also found out that a lot of home hobby craftsmen made different thinks for the war effort during WWII. One of these things was making wooden models of the war planes so they could be used to train plane spotters in the military.
It is also fun to see which technology ideas for the future succeeded and which ones failed.
-- Mike, American in Norway