Lacteals, b. [453].

Latent heat, b. [160].

Laws of motion, first, a. [322].

Laws of motion, second, a. [330].

Laws of motion, third, a. [334].

Leap year, a. [118].

Leyden phial, b. [196].

Librations (of planets), a. [297].

Libration of Jupiter’s Satellites, a. [441].

Limb of an instrument, a. [162].