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- (from the article "stringed instrument") ...in fact, passes through them into a shallow mortise cut in the end block within. The back end of this shoulder is covered by a projection of the wood at ...
- head
- (from the article "hydroelectric power") ...power, water is collected or stored at a higher elevation and led downward through large pipes or tunnels (penstocks) to a lower elevation; the difference in these two elevations is ...
- head
- (from the article "inflorescence") A head (capitulum) is a short dense spike in which the flowers are borne directly on a broad, flat peduncle, giving the inflorescence the appearance of a single flower, as ...
- head
- (from the article "comet") ...by a transient dusty "atmosphere" that is steadily lost to space. This feature is the coma, which gives a comet its nebulous appearance. The nucleus surrounded by the coma makes ...
- head butting
- (from the article "cetacean") ...teeth over another male. Adult male beaked whales (family Ziphiidae) have very densely ossified rostra (beaks) used as weapons in combat for females. Another more dangerous means of aggression is ...
- head flattening
- practice of intentionally changing the shape of the human skull, once common in some cultures. Head flattening was practiced by a number of North, Central, and South American Indian tribes, ... [2 Related Articles]
- head gas meter
- (from the article "gas meter") Head-type gas meters measure quantity of gas per unit time. The measurement is based on a deliberately produced pressure drop, or head, between two nearby points in a tube in ...
- head louse
- (from the article "human louse") ...and can be an important carrier of epidemic typhus and other louse-borne human diseases such as trench fever and relapsing fever. There are two subspecies, Pediculus humanus capitis, the head ...
- head of state
- (from the article "Hong Kong") The Basic Law vests executive authority in a chief executive, who is under the jurisdiction of the central government in Peking (Beijing) and serves a five-year term. Legislative authority rests ...
- Head Start program
- (from the article "education") ...intervention techniques include providing intensive instruction and attempting to restructure home and living conditions. The Economic Opportunity Act of 1964 provided for the establishment of the Head Start program, a ...
- head voice
- (from the article "speech") For many centuries the so-called vocal registers were well known to the classical masters of the bel canto style of singing, the basic registers being called chest voice, midvoice, and ...
- head wave
- (from the article "Earth exploration") ...the shortest path, but as source- Geophone distances become greater, seismic waves travelling by longer paths through rocks of higher seismic velocity may arrive earlier. Such waves are called head ...
- Head, Bessie Emery
- African writer who described the contradictions and shortcomings of pre- and postcolonial African society in morally didactic novels and stories. [1 Related Articles]
- Head, Edith
- American motion-picture costume designer.
- Head, Major Bernard
- (from the article "Aspiring, Mount") ...ridges reach 9,932 feet (3,027 m), with thick rain forests clothing the western slopes. Sighted and named by the explorer-surveyor John Turnbull Thomson in 1857, the peak was first scaled ...
- Head, Sir Henry
- (from the article "sensory reception, human") A distinction between the discriminatory (epicritic) and emotional (protopathic) features of sensations was made by Sir Henry Head (1861-1940), a British neurologist who noted that after a sensory nerve from ...
- head-mounted display
- (from the article "virtual reality") ...artifact most often identified with virtual reality, the head-mounted 3-D computer display. In 1967 Bell Helicopter (now part of Textron Inc.) carried out tests in which a helicopter pilot wore ...
- Head-Smashed-In Buffalo Jump
- (from the article "Alberta") ...fine displays of dinosaurs. The latter institution operates in association with Dinosaur Provincial Park near Brooks, the first place to be designated a World Heritage site for its fossil resources. ...
- head-tail galaxy
- (from the article "galaxy") The form of certain radio galaxies in clusters points rather strongly to the presence of intergalactic gas. These are the "head-tail" galaxies, systems that have a bright source accompanied by ...
- head-to-tail coupling
- (from the article "isoprenoid") ...and polyterpenes, (C5H8)n. Many of the isoprenoids possess carbon skeletons that may be regarded as built up from isoprene units linked "head to tail"; that is, carbon atom 1 of ...
- headache
- pain in various parts of the head. Headaches affect nearly everyone at some time in their life, recurrent headaches approximately 10 percent of persons. Headaches vary widely in their intensity ... [3 Related Articles]
- headbox
- (from the article "papermaking") The function of the headbox is to distribute a continuous flow of wet stock at constant velocities, both across the width of the machine and lengthwise of the sheet, as ...
- headcut
- (from the article "river") ...the subsoil where this is exposed in section, forming small tunnels that may attain lengths of many metres. Collapse of tunnel roofs initiates lateral gullying and lengthens existing cuts headward. ...
- headdress
- (from the article "jewelry") The most adorned and decorated section of the body was the head. Although gold and other precious metals were components of these ornaments, feathers and other brightly coloured materials were ...
- header
- machine for harvesting grain, developed in the United States, Canada, and Australia; along with the binder, it was standard equipment for harvesting wheat in the United States and Canada until ... [1 Related Articles]
- header
- (from the article "bond") Bonding may be achieved by overlapping alternate courses (rows or layers) in brickwork, by using metal ties, and by inserting units vertically so they join adjacent courses. A bond course ...
- header
- (from the article "team roping") ...which two mounted cowboys attempt to rope and immobilize a full-grown steer. The event is timed, and the team with the lowest time wins. The team is allowed three throws. ...
- headhunting
- practice of removing and preserving human heads. Headhunting arises in some cultures from a belief in the existence of a more or less material soul matter on which all life ... [3 Related Articles]
- heading back
- (from the article "gardening") ...the older branches. Fruit trees in particular when pruned annually often give fruit of finer quality, larger in size, freer of disease, and of better colour. The two basic pruning ...
- headless line
- in prosody, a line of verse that is lacking the normal first syllable. An iambic line with only one syllable in the first foot is a headless line, as in ...
- headlight
- (from the article "automobile") Headlights must satisfactorily illuminate the highway ahead of the automobile for driving at night or in inclement weather without temporarily blinding approaching drivers. This was achieved in modern cars with ...
- headline inflation
- (from the article "Economic Affairs") Headline inflation, which included food and energy, rose fast relative to rates over the previous decade, reflecting the higher oil prices. In October consumer prices rose 4.3%, compared with 3.2% ...
- Headmasters' Conference
- (from the article "Thring, Edward") ...in England, introduced wood and metal workshops, and provided a swimming pool. In academic matters he stressed sound training in mathematics, the classics, and music. In 1869 he founded the ...
- headphone
- small loudspeaker (earphone) held over the ear by a band or wire worn on the head. Headphones are commonly employed in situations in which levels of surrounding noise are high, ...
- Headquarters of the Federation of Building Industries
- (from the article "Prouve, Jean") ...clubhouse at Buc Airport (1937-39) and the Maison du Peuple at Clichy, France (1938-39). Prouve's commitment to the idea of prefabricated building components is exemplified by his Headquarters of the ...
- headquarters platoon
- (from the article "military unit") ...or more platoons make up a company (q.v.), which has 100 to 250 soldiers and is commanded by a captain or a major. The function of administration is introduced at ...
- headscarf
- (from the article "France") ...Assembly's approval on February 10, by a sweeping 494-36, of the ban on the wearing of ostentatious religious symbols in schools. This was principally aimed at Muslim girls wearing Islamic ...
- headset
- (from the article "headphone") ...listener is moving about or wants to listen without disturbing other people. A headphone may be equipped with one earphone or two and may include a miniature microphone, in which ...
- headstall
- (from the article "bridle") The reins, lines held in the hand of the rider or driver, are connected to either side of the bit so that a tug on either side turns the animal ...
- headstander
- any of several fishes of the family Anostomidae (order Characiformes). All species are small, reaching a maximum length of 20 cm (8 inches), and are confined to freshwater habitats in ... [1 Related Articles]
- Headstone Manor
- (from the article "Harrow") The earthwork at Grim's Dyke (Grimsdyke, or Grimm's Ditch) is testament to the Saxon settlement of the area. Medieval and later architecture in Harrow includes the 14th-century Headstone Manor, a ...
- headwear
- (from the article "dress") ...worn by men and women alike, are known from an early period. They served not only as an adornment but also to protect the wearer's head from the burning rays ...
- Healers
- (from the article "Syrian and Palestinian religion") ...of the 2nd millennium BC, skeletal remains and treasures suggest a cult of deceased monarchs. From Mari and Ugarit researchers have learned of a significant cult of former rulers (called ...
- Healesville
- town, Victoria, Australia. It is situated in the Dandenong Ranges and on the Maroondah Highway northeast of Melbourne. Founded (1860) on the fertile flats of the Acheron River, a tributary ...
- Healesville Sanctuary
- (from the article "Victoria") Victoria is dotted with numerous state and national parks, notably Alpine National Park, which protects some 2,500 square miles (6,500 square km) of the Great Dividing Range. The Healesville Sanctuary, ...
- Healey, Denis Winston, Baron Healey of Riddlesden
- British economist and statesman, writer, and chancellor of the Exchequer from 1974 to 1979.
- Healey, Jeff
- Canadian musician was a virtuoso guitarist whom retinoblastoma had left blind before he was a year old. He played the instrument positioned flat on his lap, a highly unconventional method ...
- healing
- (from the article "fracture") The major complications of fracture include failure to heal, healing in a position that interferes with function, and loss of function despite good healing. Failure to heal is frequently a ...
- healing cult
- religious group or movement that places major, or even exclusive, emphasis on the treatment or prevention by nonmedical means of physical or spiritual ailments, which are often seen as manifestations ... [6 Related Articles]
- healing statue
- (from the article "art and architecture, Egyptian") ...representation but also a vehicle for appropriate texts, which might be inscribed obtrusively over beautifully carved surfaces. The extreme example of such "disfigurement" is a so-called healing statue (Louvre) of ...
- health
- in human beings, the extent of an individual's continuing physical, emotional, mental, and social ability to cope with his environment. [40 Related Articles]
- Health and Disease
- Health and Human Services, Department of
- (from the article "public health") ...grouped in a department that is responsible for health and for related functions. In the United Kingdom they are carried out by the Department of Health and Social Security; in ...
- Health and Morals of Apprentices Act
- (from the article "education") ...but even they wanted to see limited state influence; the state could pay the musicians but not call the tune. Not until 1802 did Parliament intervene in the development of ...
- health and safety law
- (from the article "labour law") ...as occupational health and accident prevention regulations and services; special regulations for hazardous occupations such as mining, construction, and dock work; and provisions concerning such health and safety risks as ...
- Health and Social Security, Department of
- (from the article "public health") ...from country to country. Major health functions are frequently grouped in a department that is responsible for health and for related functions. In the United Kingdom they are carried out ...
- health care
- (from the article "Business Overview") The Big Three achieved a major restructuring of their employee health care obligations, which had been a major cost burden on the companies. After a two-day strike in September against ...
- health care ethics
- (from the article "bioethics") ...professionalization of nursing and the perception of nurses as ethically accountable in their own right have led to the development of a distinct field known as nursing ethics. Accordingly, health ...
- health care proxy
- (from the article "health law") ...O'Connor in the case of Nancy Cruzan (a young woman in a similar condition as Karen Ann Quinlan but who needed continued tube feeding to survive), is a document that ...
- health club
- (from the article "gymnasium") ...and the term ordinarily designates a room or building for the practice of physical education. Outside the school system, the term was largely replaced in the late 20th century by ...
- health insurance
- system for the financing of medical expenses by means of contributions or taxes paid into a common fund to pay for all or part of health services specified in an ... [14 Related Articles]
- Health Insurance Plan of Greater New York
- (from the article "health maintenance organization") ...Medical Group in California, U.S., in 1929. In this model, physicians are organized into a group practice, and there is one insuring agency. The Kaiser Foundation Health Plan in California, ...
- health law
- the branch of law dealing with various aspects of health care, including the practices of caregivers and the rights of patients.
- health maintenance organization
- organization, either public or private, that provides comprehensive medical care to a group of voluntary subscribers, on the basis of a prepaid contract. HMOs bring together in a single organization ... [7 Related Articles]
- Health Organization
- (from the article "World Health Organization") ...in 1948 to further international cooperation for improved health conditions. Although it inherited specific tasks relating to epidemic control, quarantine measures, and drug standardization from the Health Organization of the ...
- health physics
- (from the article "radiation") ...well as other forms of radiation. The widespread use of nuclear reactors and the development of high-energy particle accelerators, another prolific source of ionizing radiation, have given rise to health ...
- Health Service Employees, Confederation of
- (from the article "UNISON") ...Congress, the national organization of British trade unions. UNISON was created in 1993 through the merger of several unions, including the National Union of Public Employees (formed 1905) and the ...
- health, bill of
- (from the article "quarantine") In the 16th century the system was extended by the introduction of bills of health, a form of certification that the last port of call was free from disease; a ...
- Health, Education, and Welfare, Department of
- (from the article "Eisenhower, Dwight D.") ...overseas commitments caused budget deficits during five out of eight years. The minimum wage was increased to $1 per hour; the Social Security System was broadened; and in the spring ...
- Health, Ministry of
- (from the article "public health") The public health services for the Soviet Union were directed by the Ministry of Health. Each of 15 republics of the union had its own ministry. Each republic was divided ...
- Healy, George
- American academic painter of highly realistic portraits.
- Healy, James Augustine
- first African American Roman Catholic bishop in the United States and an advocate for children and Native Americans.
- Healy, T.M.
- leader in the campaigns for Irish Home Rule and for agrarian reform, and the first governor-general of the Irish Free State. [1 Related Articles]
- Healy, Ted
- (from the article "Three Stooges, the") ...the 1910s, acting in everything from burlesque revues to Shakespearian plays, but found little success until 1922, when he formed a comedy act with his older brother, Shemp, and longtime ...
- Heaney, Seamus
- Irish poet whose work is notable for its evocation of Irish rural life and events in Irish history as well as for its allusions to Irish myth. He received the ... [6 Related Articles]
- heap leaching
- (from the article "gold processing") ...cyanidation is accomplished by vat leaching, which involves holding a slurry of ore and solvent for several hours in large tanks equipped with agitators. For extracting gold from low-grade ores, ...
- Heard and McDonald Islands
- subantarctic island groups, together forming an external territory of Australia and lying in the southern Indian Ocean, 2,500 miles (4,000 km) southwest of Perth. Volcanic in origin, Heard Island is ... [1 Related Articles]
- hearing
- in law, a trial. More specifically, a hearing is the formal examination of a cause, civil or criminal, before a judge according to the laws of a particular jurisdiction. In ... [2 Related Articles]
- hearing
- (from the article "hearing") in biology, physiological process of perceiving sound. See ear; mechanoreception; perception; sound reception.FIGURESbasilar membraneModel
- hearing aid
- device that increases the loudness of sounds in the ear of the wearer. The earliest aid was the ear trumpet, characterized by a large mouth at one end for collecting ... [3 Related Articles]
- hearing protector
- (from the article "ultrasonics") ...to the ears of people working nearby. This type of device is often used in offices of doctors and other professionals. Another technique for reducing personal noise level is through ...
- hearing test
- (from the article "ear, human") Before the development of electroacoustic equipment for generating and measuring sound, the available tests of hearing gave approximate answers at best. A person's hearing could be specified in terms of ...
- Hearn, Francis Dayle
- American sports broadcaster (b. Nov. 27, 1916, Buda, Ill.-d. Aug. 5, 2002, Los Angeles, Calif.), was for more than 40 years the play-by-play radio and television announcer for the Los ...
- Hearn, Lafcadio
- writer, translator, and teacher who introduced the culture and literature of Japan to the West. [1 Related Articles]
- Hearne, Samuel
- English seaman, fur trader, and explorer, the first European to make an overland trip to the Arctic Ocean. He was the first to show the trend of the Arctic shore. [7 Related Articles]
- Hearne, Thomas
- English historian and antiquarian whose editions of English medieval chronicles were important sources for subsequent historians. [1 Related Articles]
- hearsay
- in Anglo-American law, testimony that consists of what the witness has heard others say. United States and English courts may refuse to admit testimony that depends for its value upon ... [1 Related Articles]
- Hearst Tower
- (from the article "Architecture") In New York, British architect Foster designed the much-discussed 40-story Hearst Tower, which stood atop a six-story older building, designed in 1928 by Viennese architect Joseph Urban. Urban's building was ...
- Hearst, Patricia
- an heiress of the William Randolph Hearst newspaper empire who was kidnapped in 1974 by leftist radicals called the Symbionese Liberation Army, whom under duress she joined in robbery and ...
- Hearst, Randolph Apperson
- American publishing executive (b. Dec. 2, 1915, New York, N.Y.-d. Dec. 18, 2000, New York), was the last surviving son of newspaper tycoon William Randolph Hearst and served the family's ...
- Hearst, William Randolph
- American newspaper publisher who built up the nation's largest newspaper chain and whose methods profoundly influenced American journalism. [10 Related Articles]
- Hearst, William Randolph, Jr.
- U.S. journalist and newspaper proprietor (b. Jan. 27, 1908, New York, N.Y.--d. May 14, 1993, New York), shared a 1956 Pulitzer Prize for international reporting shortly after being named editor ...
- heart
- organ that serves as a pump to circulate the blood. It may be a straight tube, as in spiders and annelid worms, or a somewhat more elaborate structure with one ... [58 Related Articles]
- heart attack
- death of a section of the myocardium, the muscle of the heart, caused by an interruption of blood flow to the area. A heart attack results from obstruction of the ... [11 Related Articles]
- heart block
- lack of synchronization in the contractions of the upper and the lower chambers of the heart-the atria and the ventricles. The lack of synchronization may range from a slight delay ... [4 Related Articles]
- Heart Butte Dam
- (from the article "Heart River") ...flows about 200 miles (320 km) generally eastward past Dickinson to join the Missouri River south of Mandan, opposite Bismarck. The Dickinson Dam, impounding Edward Arthur Patterson Lake, and the ...
- heart disease
- (from the article "Health effects of primary smoke constituents") Heart disease as such was not recognized in nontechnological cultures, but the beating heart and its relationship to death have always been appreciated. Sudden death, now usually attributed to heart ...
- heart failure
- general condition in which the heart muscle does not contract and relax effectively, thereby reducing the performance of the heart as a pump and compromising blood circulation throughout the body. ... [4 Related Articles]
- heart murmur
- (from the article "auscultation") ...or leakage of blood through them because of imperfect closure results in turbulence in the blood current, causing audible, prolonged noises called murmurs. In certain congenital abnormalities of the heart ...
- Heart of Atlanta Motel v. U.S.
- (from the article "Civil Rights Act") ...for pro-segregation candidates for public office, and some racial violence. The constitutionality of the act was immediately challenged and was upheld by the Supreme Court in the test case Heart ...
- Heart River
- river, Billings county, southwestern North Dakota, U.S. It rises in the badlands and flows about 200 miles (320 km) generally eastward past Dickinson to join the Missouri River south of ...
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