Apparently they can be used for making turpentine and rosin. Who knew? Well, quite a lot of people, I guess, but being a town-i-fied (i.e., not quite citified) Gen X girl, it had never crossed my mind. Then again, my mother was a pre-Baby Boom baby in the backwoods of the Deep South who remembers seeing smoke from stills rising from the woods on clear days, and I don't think it ever occurred to her that those stills might be making turpentine. Anyway, I mention it as yet another bit of the past that is rapidly slipping out of the general consciousness.