(mäs ´d ) (KEY) , d. 956, Arab historian, geographer, and philosopher, b. Baghdad. He traveled in Spain, Russia, India, Sri Lanka, and China and spe...
1811–98, American geologist and paleontologist, b. Hingham, Mass., grad. Rensselaer School (later Rensselaer Polytechnic Institute), 1832. An author...
1793–1866, English geologist. Hopkins studied mathematics at Cambridge, and then supported himself as a private mathematics tutor. Many of Englandâ€...