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TEMPERATURE-TENACITY

The general principle of expansion by heat is employed he devices for measuring or comparing temperatures. Two ies are said to be in thermal equilibrium, and so to have same temperature, if when brought into thermal commuation neither loses heat to nor gains it from the other. sations of temperature are changes of consciousness used by the application of stimuli of heat or cold to surface of the body. The end organs of the temperature se are situated in minute points scattered over the skin great numbers, and known as "temperature spots," some eting to stimuli of cold and some to stimuli of heat, but to both. The corpuscles and nerve endings which serve recipients for temperature stimuli have not as yet been erentiated from those of TOUCH (q.v.) or pressure.

emperature, CRITICAL. One in the cooling process of als and alloys at which they have been found to have very ch less tenacity than when hotter or colder. This is the perature at which cracks occur in castings as they cool. steel, experiments have seemed to show that this is ab. , corresponding to a blue heat. For other metals such a perature exists, but its limits have not yet been investied. See CRITICAL TEMPERATURE.

emperature Constant of Plants. Total quantity of cor total excess of temperature above 40° required to bring ant from budding up to the point of complete ripening of cuit; sometimes known as Hoffman's or Linnsser's Constant. emperature of Reversal. See THERMOELECTRICITY. emperature of the Body. The normal temperature ne body averages 98.4° F. The human body can bear a high ee of heat diffused in the atmosphere, 400° F. and upward e been breathed for a short time, and cold 115° F. below zing have been withstood. Excessive heat disposes the to gastric and intestinal diseases, and particularly enement of the liver, which is of common occurrence in the d zone. Heat acts as an excitant, and cold as a sedative, cing sleep, the tendency to which, after long exposure, mes irresistible. See ANIMAL HEAT. emperature of the Earth. See EARTH. emperature of the Moon.

greatly. Langley, from his latest researches, concludes Authorities have difit can never rise above the freezing point of water. empering of Steel. Operation of giving to steel just est relation between hardness and toughness to adapt it se in cutting implements, etc. ening by sudden cooling to send the carbon into combiThe action seems to be in -n with the iron; in gradual cooling the carbon seems to -ate out. The hotter the steel is when suddenly cooled, more carbon unites with the metal, and the harder and brittle the steel. In tempering, therefore, two methods sed. In one the metal is heated from a cold state to just -ight temperature for the hardness desired, and is then ched: in the other, the whole bar is heated to cherry-red, the particular part to be tempered is quenched and hardoutright by immersing that part only. The heat is cond to this hardened edge from the body of the bar, and ns or draws it until the desired point is reached, when the e is quenched. The tempering process seems to depend e rapidity with which the part passes from the limits of o a temperature below that for forging, or to 400°. The eratures are indicated on steel by the succession of tints appear on a bright surface of the edge. These seem to e to oxide forming. The following table gives these tints emperatures, and the uses for which the steel is adapted tempered by either process. yellow, very pale. .

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(Steel engraving tools, ham-
mer faces, planer tools.
Wood engraving tools, mill-
ing cutters.
Wire-drawing dies, boring
cutters.

Rock drills, taps, chasers.
penknives.

Reamers, gouges, stone-cut-
ting tools, twist drills.

530° Wood augers, drifts.

550° Cold chisels, axes.
570°

Framing chisels, planer
knives.

590° Circular saws, screw drivers.

"with green tinge. 630° Springs, handsaws. EEL, METALLURGY OF.

per Screw. Mechanical device attached to the upper the string of tools used in well-boring, by means of which

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portion of it was first leased to students of the common law
The Temple Church.
1346. The Inner and Middle parts are now occupied by barris-
ters, the Outer has been remodeled into the Exeter Buildings.

cation of the World; head-master of Rugby 1858-69; Bp. of
Temple, FREDERICK, D.D., b.1821. Author of the first and
most memorable of the Essays and Reviews, 1860, on The Edu-
Exeter 1869, and of London 1885; Abp. of Canterbury 1896.
Religion and Science, 1884.

Temple, H. J. See PALMERSTON.

Temple, SIR RICHARD, LL.D., D.C.L., b.1826. Anglo-In-
dian official 1846-80, knighted 1867; Gov. of Bengal and of
Bombay; M.P. 1885; writer on India.

ville Papers, 4 vols., 1852-53.
Temple, RICHARD GRENVILLE. EARL, 1711-1779. M.P. 1734;
Lord Privy Seal 1757-61; adherent of Chatham till 1766. Gren-

Temple, SIR WILLIAM, 1628-1699. English diplomatist;
Baronet 1666; Envoy to Holland 1668-70 and 1674; negotiator
controversy. Memoirs, 1691-1709.
of several treaties.
style: the paper on Ancient and Modern Learning led to a
His Miscellanea, 1679-92, are notable for
and literary executor.
Swift was his secretary
Works, 1720, repub. 1814.
Temple, WILLIAM ERNEST, 1821-1889. Astronomer at Ob-
servatory Arcetre, Italy; discoverer of six asteroids and fifteen
comets.

Temple, WILLIAM GRENVILLE, U.S.N., 1824-1894. Captain
1870, Commodore 1878, Rear-admiral 1884.

Temple Bar. Gate in London, between the Strand and
Fleet Street, till 1878.

Temple Society. German Christians who separated from
await the second coming of Christ. They number ab. 5,000, of
the church in Wurtemberg and settled in Palestine 1868. They
which 1,300 are in Palestine.

Temporal Bone. One of the bones of the skull forming that part of the head behind the brow and around the ear. The flat upper portion of the bone forms the temple, while the lower and more irregular part incloses the auditory apparatus. The name is given to this bone because the hair frequently first begins to turn gray in this region.

Temporal Power. Properly, the Pope's regal authority in the States of the Church, abolished 1871; also, more or less, the indirect civil authority resulting from his spiritual claims. Temporary Stars. Stars which have appeared suddenly and after a time have again disappeared. Among recorded instances are those of Hipparchus 134 B.C., of Tycho Brahe 1572, Nova Cygni 1876. a star in the nebula of Andromeda 1885, and Nova Auriga 1892.

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rectly proportional to the breaking weight, and inversely tional to the sectional area. It is also affected slightly her considerations; e.g., with the same cross section, a er has greater tenacity than, a prism. The most tenamaterial is drawn cast-steel; a wire 1 millimeter in diaman sustain a weight of 80 kilograms.

maille. Rampart between two bastions raised in the ditch in front of the curtain.

nant. Holder of lands by any title. If absolute owner tenant in fee; but he may hold for life, or for a fixed of years, or from year to year, or at will or by sufferance. n, he may be tenant in common, i.e., he and others may several titles to a piece of land, but be united in possesor joint tenant, when he and others own land by a joint created expressly by one and the same deed or will; or in rceny, when he and others take by descent as one heir. ordinary tenant holds land from another, giving some conration, either in money, produce, or personal service; or Es another's house.

"enant Right. Supposed right to retain the use of land
ong as the tenant continues to pay the customary rent or
ight advance thereon; and, on leaving the land, to dispose
ts good-will to another tenant.

Tenasserim. S. part of Burmah, between Siam and Bay
Bengal; held by England since 1825. Area 46,590 sq. m.;

Tencin, MME. CLAUDINE ALEXANDRINE GUÉRIN DE, 16811749. French social personage, mistress of the Regent and other eminent men, mother of D'Alembert; author of three romances, 1735-47. Lettres, 1790-1806.-Her brother, PIERRE, 1680-1758, was a Cardinal.

Tendai-Shin. Japanese Buddhist sect, founded from China ab.805, afterward in three branches.

Tender. Proffer of an act in accordance with the offerer's legal obligation.

Tendon. Tissue which binds a muscle to its place of attachment. It is white and fibrous; in many muscles cord-like in form. The contractile muscular tissue is attached to this inelastic substance, on which it pulls as one would pull on a rope, causing the desired movement through its attachment to the bone at the other end of the tendon.

Tendril. Slender leafless branch, or modified leaf developed into an organ adapted to aid a plant in climbing, as in the grape or pea.

Responsorium following the Tenebræ Factæ Sunt. fifth lesson on Good Friday in R.C. Ch.; descriptive of the last agonies of Christ. The service in which it occurs breathes the spirit of gloom, penitence, and mourning. The altar is shrouded in black, the bells are dumb, the candles on the altar are extinguished one by one, not to be relighted until Easter Eve.

Tenedos. Greek island in the Ægean Sea, off the Troad; ab. 8 m. by 3; held by Turkey, whose fleet was destroyed here by the Greeks Nov. 22, 1822. Pop. ab.15,000.

Tenement. Land, or anything of a permanent nature which may be holden.

Tenement Houses. Those which accommodate several tenants; in 1893 more than 70 per cent of the population of New York City were thus housed. At the present time these houses are, at the best, well provided with all modern conveniences, and, in proportion to the conveniences, are the most economitions being provided with light and heat and other Ding under control of the

Village Tavern, by David Teniers. (In the Art Gallery in Schwerin)
for rapid creation, for incisive, dexterous handling, and the
cooler harmonies of color. He painted ab.700 pictures.-His
father, DAVID, 1582-1649, was a painter of similar subjects.
Tenimber Islands. See TIMOR-LAUT.

Tenison, THOMAS, D.D., 1636-1715. Bp. of Lincoln 1691;
Abp. of Canterbury 1694.

Ten Kate, JAN JACOB LODEWIJK, b.1819. Dutch poet;
pastor at Amsterdam from 1860. Creation, 1866, tr. 1888.
Tennant, WILLIAM, 1784-1848. Scottish poet and Oriental-
ist; prof. St. Andrews 1835. Anster Fair, 1812; Syriac Gram-
mar, 1840.

Tennantite. Cu,As,S,. Mineral copper sulph-arsenite, usually containing some antimony and passing by gradations into tetrahedrite.

Tennemann, WILHELM GOTTLIEB, 1761-1819. Prof. Marburg 1804. Hist. Philosophy, 11 vols., 1798-1819; Manual, 1812, tr.1832. Tennent, SIR JAMES EMERSON, 1804-1869. Irish M.P. 1832; in India 1841-50: Sec. Board of Trade 1852-67; Baronet 1867. Greece, 1826-30; Belgium, 1841; Ceylon, 1859.

Tennent, WILLIAM, 1673-1745. Irish immigrant ab.1717;
founder in Bucks co., Pa., 1726, of the "Log College," the first
Presbyterian school in America.-Of his four sons, all pastors,
the most noted were GILBERT, 1703-1764, of New Brunswick,
N. J., and Phila., and WILLIAM, 1705-1777, of Freehold, N. J.,
whose trance-experiences in youth were much discussed.

Tennessee. One of the s. central States; area 42,050 sq.
m. Its e. boundary follows the crest of the Great Smoky Mts.,
and their w. spurs occupy its e. portion. To these succeed the
valley of the T, intersected by long, narrow, parallel ridges.
succeeded on the w. by the escarpment of the Cumberland
plateau, which rises to a height of ab.3,000 ft. From its
summit the plateau slopes gently to the n.w., and is deeply
eroded by streams. The remainder of the State is of undulat-
Smoky Mts. are composed of Devonian beds; the T. valley is
ing surface without decided features. The w. slopes of the
floored by Silurian, with ridges of Carboniferous sandstone.
The Cumberland plateau is of the Carboniferous formation,
and this extends w. to the lower T., except an area of Silu-
rian about Nashville. It is succeeded on the w. by Cretaceous
and Tertiary. Immediately along the Mississippi are Quater-
nary deposits. The principal river, excepting the Mississippi,
which flows along the w. border, is the T., which, heading in
the mts. in the e. part, flows s. w. beyond the limits of the
mouth in w. Ky.; it is navigable from its mouth up to Muscle
Shoals. The Cumberland also flows across the n. part. The
State, and in its w. part returns, crossing it to reach its
mineral resources consist mainly of coal and iron. The in-
dustries are mainly agricultural, cotton. corn, and tobacco
acres are in farms, and the value of farms, farming imple-
being the principal crops. Of its area more than 20,000,000
ments and machinery is ab. $250,000,000. The value of farm
products in 1889 was ab. $55,194,181. Its manufacturing inter-
ests are mainly confined to a few leading cities, and are not
as yet very extensive. The total length of railroads in opera-
tion in 1891 was 2,767 m. The capital is Nashville. The other
principal cities are Memphis, Chattanooga and Knoxville. T
was originally part of N. C. The Watauga region, settled 1769,
was the scene of sundry battles with Indians and British. The
State of Franklin existed 1784-88. N. C. ceded the region
the U. S. 1790, and T. was admitted 1796 as the 16th State

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TENNESSEE-TENTERDEN

utbreak of the Civil War it at first refused to secede,
ed the seceding States June 1861, furnished 50 regi-
o the Confederate army, and was the scene of some
most important battles during the war. Pop., 1890,
3, nearly one-fourth colored.
nessee, UNIVERSITY OF.

At w. Knoxville; successor
nt Coll.. chartered 1794; this became 1807 E. Tenn.
1840 E. Tenn. Univ., and in 1879 Univ. of Tenn. The
xperiment Station is connected with it. The academic
ment has a faculty of 22, with 334 students; the law
has 38 students under 3 instructors; the schools of medi-
d dentistry, at Nashville, have 155 students and 28 in-
ors. Whole number of students 516; library 13,000 vols.
nessee River. Branch of the Ohio, rising in s. w.
d e. Tenn., in a valley between the high mts. of N. C.
e Cumberland plateau. It flows s. w., w., and n. Length
It is navigable to
200 m., drainage area 43,897 sq. m.
anooga, except for the rapids at Muscle Shoals.
nney, SAMUEL. 1748-1816. Surgeon in Revolutionary
M.C. from N. H. 1800-7.-His wife, TABITHA (GILMAN),
1837, m.1788, pub. Female Quixotism, 1807.

nney, SANBORN, 1827-1877. Prof. Vassar 1865, Williams
Geology, 1859: Zoology, 1865-75.

Hist. Rebellion,
enney, WILLIAM JEWETT, 1814-1883. N. Y. journalist;
Appleton's Annual Cyclopædia, 1861-82.
-His wife, SARAH (BROWNSON), 1839-1876, pub. Life of
tzin, 1873.

enniel, JOHN, b.1820. Cartoonist in Punch since 1851; trator of Alice in Wonderland, Ingoldsby Legends, and er books.

ennis. Oldest of all existing games of ball; was played Europe in the Middle Ages, coming from Italy to France, from France to England. The ball is thrown against a 1 and struck by a racket on its rebound. It was formerly yed in the open air, now generally in courts with walls, or h walls and roof. See COURT TENNIS and RACKETS. Tennis, or LAWN TENNIS. Game played by two or four yers. It consists in driving a small felt-covered ball across net so that it may strike within a certain prescribed area. e players take turns in serving, i.e., putting the ball in play; must strike within a certain space of the opponent's court. Iter that, it may be struck on the fly, volleyed, or after the st rebound. A player failing to hit the ball, or hitting it nd failing to place it over the net and within the confines of me opponent's court, loses the stroke.

Tennyson, ALFRED, D.C.L., LORD, 1809-1892. Poet lauHis first volumes, 1830-32, won little eate 1850, Baron 1884. ttention; those of 1842 made him famous. The Princess folOwed, 1847, the greater In Memoriam, 1850, Maud, 1855. Four Idylls of the King, 1859, contained much of his noblest

Tennyson, as a young man.

work; others were added 1869 and later. Enoch Arden, 1864, won great popularity. His later works include three historical plays, Queen Mary, 1875, Harold, 1877, and Becket, 1884, besides The Cup. 1884, and The Foresters, 1892; but his genius shone more brilliantly in the lyric and the minor epic than in He was a consummate artist, unsurI thought and feeling. His

tig form.

lived from 1853 at Farringford, Isle of Wight, and from 1870
has pub. 3 vols. of poetry, 1854-91. See also TURNER, CHARLES T.
in the summer at Aldworth.-His brother, FREDERICK, b. 1807,
Tenochtitlan. Chief city of the Aztecs, founded ab.1325
on an island in Lake Tezcuco; besieged, taken, and largely de-
stroyed by Cortes 1521. The new capital built on its site long
bore the old name, since changed to Mexico. Mexitl was the
Aztec name.

Tenon. See MORTISE.

Tenor. Highest adult male voice; also applied to instruments of about the same compass.

Tenore, MICHELE, 1780-1861. Prof. of Botany in Naples. Flora Napolitana, 1811-38; Géographie physique et botanique de Naples, 1827.

Tenorite. CuO. Mineral compound of copper and oxygen, occurring in small scales with metallic luster; black oxide of copper.

Tenos. One of the Cyclades, s.e. of Andros. Area 70 sq.
m., pop. ab.20,000.

Ten Persecutions. See PERSECUTIONS.
Tenpins. See BOWLS.

Tenrec. See TANREC.

Tensas. River joining the Washita, at Trinity, La., after flowing 250 m. through the State in a s.e. direction.

Tense. Modification of a verbal root to express time of action. Augment and reduplication seem to have been the earliest means for indicating a change from present to past. For this purpose the Germanic tongues largely employed Ablaut, i.e., a change of the radical vowel, as in drink-drank.

Values

Tensile Strength. Force required to tear apart a rope
or bar when pulling in the direction of its length; usually
measured in pounds per sq. in. of the cross-section.
ab. 18,000
for strength are given in the accompanying table:
Brass, cast....

66

sheets and wire. Bronze (for guns).

66

66

66

(Tobin's, Cu,Sn, Tn.).. Phosper, cast.

Copper, cast...

66

sheets...

wire..

Iron, cast, ordinary.

66 best...

for ordnance.. wrought, bars..

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plate, best... eye-bars. large forgings. wire.

Steel, low carbon.

66

high

66

Tin, cast. Zinc, cast..

66

'rolled..

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The strongest metal tested is a special alloy of steel with tungsten, which gave in a compressed ingot an ultimate strength of 161,000 lbs. per sq. in.

Tension. State of stress produced by two forces acting in the same line but in opposite directions, as when two men pull on the ends of a rope. In practical applications it is important that the tension should not be so great as to produce a perma nent stretch, or, in engineering language, the elastic limit of the material should not be exceeded.

Tension of Vapor. See VAPOK TENSION.

Tensor. In Quaternions, coefficient of a unit vector to give any definite length.

Tent. This is a very ancient habitation, being made of bark or leaves of trees, skins of animals and textile fabrics successively. They are often made waterproof by alum or hydrocarbons. The usual material is cotton duck, and the best form is conical. Ten Tables. See TWELVE TABLES.

Tentacle. In Botany, sensitive glandular hair, by which some plants, e.g., Drosera, capture insects.

Feelers. Among Protozoa, the Acinetans Tentacles. possess them. In the Jellyfish, Hydroids, and other cœlenterates they are usually flexible and long processes of the body wall, into which frequently the body cavity extends. They may be extended a great length and retracted almost like porated into the general body. Tentacles of this nature are common in the Worms, Holothurians, and Molluscoids. pseudopodia, except that their substance never becomes incor

Tentaculocyst. Modified tentacle of the scyphomedusan Jellyfish, containing a part of the gastro-vascular canal-system, otocysts, visual organs, and olfactory hairs.

Tenterden, CHARLES ABBOTT, LORD, 1762-1832. Judge of

Common Plea 1818; Baron 1 Ten Tho Tenuiros beak and feet belong the be Tree-creeper Nuthatch (Sit Tenure. Teocalli.

Teocalli at Teosinte. value in the wa it will not devel Tephroite. lar to rhodonite Teplitz. T discovered 762; Napoleon was fo Teraphim. houses from th peatedly mentio Terashima England 1872-73 Teratology

ities, or abnorm postnatal diseas Terbium. covered by Dela Rare metal, forn orange-yellow p Terbium N made by treating it yields basic ni Terbium S

tals, isomorphou the nitrate with Terbium Tr powder: prepare in acids forming Terburg, G affected aristocra

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fine finish; celebra

to the small dimer

TEN THOUSAND-TERMINAL

on Pleas 1816; Chief-justice of King's Bench, and Knight, Baron 1827. Merchant Ships and Seamen, 1802.

Thousand, RETREAT OF. See RETREAT. uirostres. Tribe of Passerine Birds, having long thin nd feet ambulatorii or fissi; the hind toe is long. Here the beautiful clamatory Hoopoes (Upupa), the Oscinal reeper (Certhia), the Humming-birds (Trochilidae), the tch (Sitta), and the Australian Lyre-bird.

ure. Legal form of holding land under English law. calli. Pyramidal Aztec temples, usually for human sacrifices. That of the City of Mexico, famous in the history of the Conquest, stood only 14861521: it was 375 ft. by 300, 80 ft. high, and terraced. The pyramid of Cholula, 1,440 ft. square and 177 high, is supposed to be of another and earlier class.

Teocalli at Palenque.

Teos. Ancient Greek city of Lydia, w. Asia Minor, 25 m. s.w. of Smyrna; birthplace of Anacreon. osinte. Euchlaana luxurians. Forage plant of some in the warmer portions of the U. S. In ordinary seasons not develop in the North.

phroite. Mn,SiO.. Mineral manganese silicate, simirhodonite, but of different percentage composition. plitz. Town of n. w. Bohemia, noted for its hot springs, ered 762; sanitary resort. The Triple Alliance against eon was formed here Sept. 1813.

raphim. Small images idolatrously used in Hebrew s from the time of the Judges to that of Ezekiel; rely mentioned in O. T.

rashima Munenori, 1832-1893. Japanese Minister to nd 1872-73, and to the U. S. later; Count 1884.

ratology. In Botany and Zoology, study o. monstrosor abnormal forms and structures, not resulting from atal disease.

rbium. Tr. At. wt. 160° C., valence III. It was disd by Delafontaine 1860. It occurs in LAMARSKITE (q.V.). netal, forming colorless salts. Its oxide, Tr2O., is a dark

e-yellow powder.

bium Nitrate. Tr(NO:). Deliquescent substance, by treating the oxide with nitric acid. Heated to 500° C. is basic nitrates.

1503

Terceira. One of the Azores Islands. The surface is mountainous but the soil is fertile. The capital is Angra on the s. side. Exports are wine, oranges, and lumber. Area ab. 222 sq. m., pop. 45,000.

Terebenthene. See TURPENTINE.

Terebinth. Pistacia terebinthus. Turpentine tree growing about the Mediterranean, from 30-40 ft. high; source of Chian turpentine and noted for its longevity. Absalom was caught in its branches (II. Sam. xviii.).

Terebra. Ovipositor, when adapted for boring. Terebrantia. Suborder of Hymenoptera, in which the female possesses a freely projecting or a retractile ovipositor, adapted for boring. There are three tribes, PHYTOPHAGA, GALLICOLA, and ENTOMOPHAGA (q.v.).

Terebratulina. See TESTICARDINES.
Teredo. See PHOLADIDÆ.

Teredo Navalis. See SHIPWORM and PHOLADIDÆ.

Terence (PUBLIUS TERENTIUS AFER), ab. 185-159 B.C. Latin comic dramatist; b. at Carthage; brought to Rome a slave, and soon manumitted. Scipio, Lælius, and other nobles were his patrons. We possess six plays entire: Andria; Hecyra, or Step-Mother; Heanton-Timoreumenos, or Self-Tormentor; The

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Scene from the Phormio of Terence.

adaptations from the Greek of Menander, Apollodorus, and
Eunuch; Phormio; and Adelphi, or Brothers. These were all
Diphilus. They have often been translated, and, from the
modern tone which pervades them, are interesting to-day.
The diction is good, the elaboration of the plots amusing and
attractive.

bium Sulphate. Tr,(SO,),+8H,O. Colorless crys-litteris, syllabis, metris, pub. 1836.
somorphous with yttrium sulphate; made by treating
rate with sulphuric acid.

Terentianus Maurus, 2d cent. African versifier. De

bium Trioxide. Tr,O,. Terbia; dark orange-colored r: prepared from samarskite and cerite niinerals; soluble s forming the corresponding salts.

burg, GERARD, 1617-1681. Dutch genre painter, who d aristocratic types and subjects, and had a marvelously

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Commentator

Terentius Scaurus, QUINTUS, 2d cent. on Virgil and Horace; writer on grammar. Terephthalic Acid. See PHTHALIC ACIDS. Teresa, or THERESA, ST., 1515-1582. Spanish Carmelite nun, reformer of the order 1562; mystical writer; canonized 1622. Her day is Oct. 15. Autobiography, 1562; Way of Perfection, 1563; Book of Foundations, tr. 1853; Interior Castle, 1577, tr. 1852. Works, 1587.

Terete. In Botany, nearly cylindrical.

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Terhune, MRS. MARY VIRGINIA (HAWES: "MARION HARLAND"), b.ab.1832 in Va., m. 1856. Author of many novels and several cook-bocks; founder of the Home-maker, 1888. Alone, 1853; Hidden Path, 1855; Nemesis, 1860; Husks, 1863; His Great Self, 1892. Her Common Sense in the Household, 1871, is widely used.

Term. Single algebraic quantity, unconnected with others by plus or minus sign. An aggregate of two or more terms bound together by a parenthesis may be an element in a complex term; e.g., 3a(x+2y) is a single quantity in which the base is the sum of x and 2y, while 3a and are respectively coefficient and exponent.

Term-Days. Days on which it is agreed that very frequent observations shall be made simultaneously at distant stations; first adopted 1825-30, when magnetic observations were made all over Europe.

Terminal. In Botany, belonging to the apex or end. Terminal. Pillar, or pedestal, often in the form of a frustum of an inverted obelisk, to support a bust.

Terminal Inflorescence. Manner of flowering in which the flowers are produced at the ends of the t

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