n assigned to others, Newton included (1682-1744).

HADRAMAUT (150), a dry and healthy plateau in Arabia, extending
along the coast from Aden to Cape Ras-al-Hadd, nominally a dependency of
Turkey.

HADRIAN, Roman emperor, born in Rome; distinguished himself under
Trajan, his kinsman; was governor of Syria, and was proclaimed emperor by
the army on Trajan's death in A.D. 117; had troubles both at home and
abroad on his accession, but these settled, he devoted the last 18 years
of his reign chiefly to the administration of affairs throughout the
empire; visited Gaul in 120, whence he passed over to Britain, where he
built the great wall from the Tyne to the Solway; he was a Greek scholar,
had a knowledge of Greek literature, encouraged industry, literature, and
the arts, as well as reformed the laws (76-138).

HAECKEL, ERNST HEINRICH, an eminent German biologist, born at
Potsdam; carried through his medical studies at Berlin and Vienna; early
evinced an enthusiasm for zoology, and, after working for some time at
Naples and Messina, in 1865 became professor of Zoology at Jena; here he
spent a life of unceasing industry, varied only by expeditions to Arabia,
India, Ceylon, and different parts of Europe in the prosecution of his
scientific theories; he was the first among German scientists to embrace
and apply the evolutionary theories of Darwin, and along these lines he
has produced several works of first-rate importance in biology; his great
works on calcareous sponges, on jelly-fishes, and corals are enriched by
elaborate plates of outstanding value; he made important contributions to
the _Challenger_ reports, and was among the first to outline the
genealogical tree of animal life; his name is associated with
far-reaching speculations on heredity, sexual selection, and various
problems of embryology; "The Natural History of Creation," "Treatise on
Morphology," "The Evolution of Man," are amongst his more popular works;
_b_. 1834.

HAeFIZ, his real name Shems-Eddin-Mohammed, the great lyric poet of
Persia, born in Shiraz, where he spent his life; he has been called the
Anacreon of Persia; his poetry is of a sensuous character, though the
images he employs are Interpreted by some in a supersensuous or mystical
sense; Goethe composed a series of lyrics in imitation; the name Haefiz
denotes a Mohammedan who knows the Koran and the Hadith by heart
(1320-1391).

HAGAR, Sarah's maid, of Egyptian birth, who became