Faults (in strata), b. [537].

Final causes, b. [442], [492].

Finite intervals (hypothesis of), b. [126].

First law of motion, a. [322].

Fits of easy transmission, b. [77], [89].

Fixed air, b. [272].

Fixity of the stars, a. [158]. [35]

Formal optics, b. [52].

Franklinism, b. [202].

Fresnel’s rhomb, b. [105].