Columbia Encyclopedia

(Encyclopedia) Doctrine of Signatures, the concept that the key to humanity's use of various plants was indicated by the form of the plant. The red sap of the bloodroot (Sanguinaria canadensis), for instance, was be...

(Encyclopedia) Boisbrûlés bwäbrülāˈ [key] [Fr.,=burnt wood], name given the descendants of the fur traders and native peoples in W Canada, because of their dark complexion. The boisbrûlés, or brûlés, were ...

(Encyclopedia) Clarksville, city (2020 pop. 166,722), seat of Montgomery co., NW Tenn., on the Cumberland and Red rivers, in a farm, livestock, and tobacco region; pla...

(Encyclopedia) Cobb, Irvin Shrewsbury, 1876–1944, American author, b. Paducah, Ky. He was a noted New York humorist and columnist. Although he wrote over 60 books, Cobb is best known for his humorous stories of Ke...

(Encyclopedia) Punt po͝ont [key], ancient land S of Egypt accessible by way of the Red Sea. Its exact location has not been identified, but it probably included the Somali coast. Temple reliefs at Deir el Bahari in...

(Encyclopedia) Wilkinson, Ellen, 1891?–1947, English politician. Of a working-class family, she graduated from the Univ. of Manchester and became a union organizer. A Labour member of Parliament (1924–31, 1935�...

(Encyclopedia) spinel, magnesium aluminum oxide, MgAl2O4, a mineral crystallizing in the isometric system, usually as octahedrons. It occurs as an accessory mineral in basic igneous rocks, in aluminum-rich metamorph...

(Encyclopedia) Grayson, Cary Travers, 1878–1938, American naval officer and surgeon, b. Culpeper co., Va. As a physician he entered (1903) the U.S. navy, was graduated (1904) from the navy medical school, and afte...

(Encyclopedia) mango măngˈgō [key], evergreen tree of the Anacardiaceae (sumac family), native to tropical E Asia and now grown in both hemispheres. The chief species, Mangifera indica, is believed to have been c...

(Encyclopedia) blackbird, common name in North America of a perching bird allied to the bobolink, the meadow lark, the oriole, and the grackle and belonging to the family Icteridae. The European blackbird, Turdus me...