wood flour, produced by sanding wood

Over all the more populous districts the air was ever aswarm with planes up to a height of five miles, where the giant air-liners plied between the continents.

To human beings, on the other hand, each meme vehicle is a potential friend or foe, bearing a gift that will enhance our powers or a gift horse that will distract us, burden our memories, derange our judgment.

You must keep your head. There is still hope. Hope! Yes; plentiful hope -- for all this destruction!