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Black, Max

(Encyclopedia) Black, Max, 1909–88, American analytical philosopher, b. Baku, Russia (now Bakı, Azerbaijan), grad. Cambridge, Ph.D. Univ. of London, 1939. He taught at the Univ. of Illinois (1940–46…

Day, William Rufus

(Encyclopedia) Day, William Rufus, 1849–1923, American statesman and associate justice of the U.S. Supreme Court (1903–22), b. Ravenna, Ohio. Admitted (1872) to the bar, Day practiced law in Ohio and…

How is it treated?

External Links National Inst. of Mental HealthSeasonal Affective Disorders Research PageSociety for Light Treatment and Biological RhythmsSAD patients often recognize the seasonal pattern of…

Saint Valentine's Day

(Encyclopedia) Saint Valentine's Day, Western European Christian holiday, originally the Roman feast of Lupercalia. It was christianized in memory of the martyrdom of St. Valentine in a.d. 270, who,…

bioluminescence

(Encyclopedia) bioluminescencebioluminescencebīˌōl&oomacr;ˌmĭnĕsˈəns [key], production of light by living organisms. Organisms that are bioluminescent include certain fungi and bacteria that emit…

Hershey, Alfred Day

(Encyclopedia) Hershey, Alfred Day, 1908–1997, American microbiologist, b. Owosso, Mich., Ph.D., Michigan State College (now Michigan State Univ.), 1934. Hershey was a professor at the Washington…

resurrection

(Encyclopedia) resurrectionresurrectionrĕzˌərĕkˈshən [key] [Lat.,=rising again], arising again from death to life. The emergence of Jesus from the tomb to live on earth again for 40 days as told in…

Julian Day calendar

(Encyclopedia) Julian Day calendar, system of astronomical dating that allows the difference between two dates to be calculated more easily than conventional civil calendars with their uneven months…

transpiration

(Encyclopedia) transpiration, in botany, the loss of water by evaporation in terrestrial plants. Some evaporation occurs directly through the exposed walls of surface cells, but the greatest amount…

All Saints' Day

(Encyclopedia) All Saints' Day, feast of the Roman Catholic and Anglican churches, and day on which churches glorify God for all God's saints, known and unknown. It is celebrated on Nov. 1 in the…