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Beer's law

(Encyclopedia) Beer's law [for August Beer], physical law stating that the quantity of light absorbed by a substance dissolved in a nonabsorbing solvent is directly proportional to the concentration…

Longmeadow

(Encyclopedia) Longmeadow, town (1990 pop. 15,467), Hampden co., SW Mass., a residential suburb adjoining Springfield, on the Connecticut River; settled 1644, set off and inc. 1783. Bay Path College…

Luhith

(Encyclopedia) LuhithLuhithl&oomacr;ˈhĭth [key], in the Bible, unidentified path in Moab, leading to a sanctuary on a hill.

Appalachian Trail

(Encyclopedia) Appalachian Trail, officially Appalachian National Scenic Trail, hiking path, 2,144 mi (3,450 km) long, passing through 14 states, E United States. Conceived in 1921 by Benton MacKaye…

mass spectrograph

(Encyclopedia) mass spectrograph, device used to separate electrically charged particles according to their masses; a form of the instrument known as a mass spectrometer is often used to measure the…

harvest moon

(Encyclopedia) harvest moon, full moon occurring nearest to the autumnal equinox, about Sept. 23. During harvest moon the retardation (later rising each night) of the moon is at a minimum because of…

Tracy, Honor

(Encyclopedia) Tracy, Honor, pseud. of Lilbush Wingfield, 1913–89, British writer, b. Bury St. Edmonds, Suffolk. A long-time foreign correspondent, Tracy is best known as a travel writer. Her novels…

ballistics

(Encyclopedia) ballisticsballisticsbəlĭsˈtĭks [key], science of projectiles. Interior ballistics deals with the propulsion and the motion of a projectile within a gun or firing device. Its problems…

robotics

(Encyclopedia) robotics, science and technology of general purpose, programmable machine systems. Contrary to the popular fiction image of robots as ambulatory machines of human appearance capable of…

seeing

(Encyclopedia) seeing, in astronomy, the clarity with which stars and other celestial objects can be observed. It is primarily determined by the atmosphere of the earth. The most obvious phenomenon…