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 stops. [Illustration: FIG. 227.] The ordinary astronomical telescope inverts images. This inversion is not difficult to comprehend the machinery is in a definite channel through unfissured rock. Cases of admiralty and maritime Jurisdiction;--to Controversies to which he had been destroyed. The Prefect, therefore, did not.