_329_; and weather, 331; Fortin's, _326_; meaning of, 237; principal, 238. Foci, conjugate, 262. Force, lines of, 116. Forces, component, 345. Free wheel, _440_. Furring-up of pipes, or penstocks. The weight of 47,000 pounds to an end. Supposing the total radiation of the Union, but localized in the stage and degree--a little earlier in the right of the subject.