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'vance it daily into the bed of the water. The red mangle or man-grove grows on the sea-shore, and at the mouth of large rivers;but does not advance into the water. It generally rises to theheight of twenty.or thirty feet, with crooked, knotty branches,which proceed from all parts of the trunk.

RHODE ISLAND, one of the United States of North Ame-rica , bounded on the N. and E. by that of Massachusets ; S. bythe Atlantic, and W. by Connecticut . It is 47 miles long fromN. to S. and its greatest breadth is 37 from E. to W. Lou. from3° 11' to 4 U E. of Philadelphia . Lat. from 41° to 43° N.

Rhode Island, a beautiful and fertile island in the above state,to which it gives name, lying in the mouth of Narraganset Bay .It is about 10 miles long from N. to S. and four broad at an average.It is divided into three townships; viz. Newport, Portsmouth,and Middleton. It is 40 miles S. W. of Boston . Lon. 71.20.W. Lat. 41.25. N.

Rhodes, a celebrated i-land in the Archipelago , the largest andmost easterly of the Cyclades , was known in ancient times by thenames of Asleria, Ophiusu, Jitltrea, T rinacria, Corymbia, Poessa,Atabyriq, Marcia, Oloessa, Stadia, Telchinis, Pelagia, and Rliodus.In latter ages, the name of Hliodus, or Rhodes, prevailed, fromthe Gretk word yvLv, a rose : the island abounding very muchwith these dowers. It is about twenty miles distant from the coastsof Lycia and Caria, and about 120 miles in compass,

Rhodes, the capital of the above island, was built by II ippo-damus a famous architect of Miletus . It is nine miles in circum-ference. The streets are narrow, without taste, regularity, or orna-ment. The only inhabitants are 'l'urks and Jews ; the Christians,not being allowed to spend a night in it, reside in the suburbs.Lon. 28. 23. E. Lat. 3(3. 24. N.

Rhodes, a large harbour on the coast of (he above city, inwhich ships of 30 guns may anchor safely, defended from thewestern winds, which prevail here nine months in the year.

Rhodes, a town of Africa, in Tunis , on an eminence betweenthe iake of Tunis and the sea, within view of some hills whereHanno was defeated by Regains.

RIIODLS, or RODEZ, an ancient city of France , capital ofthe department of the Aveiron, 32 miles N. N. E. of Alby, and273 S. of Paris .

R HO DIOLA, Rose-wort ; in botany, a genus of the octan-dfia order, and dicccia class of plants; natural order, Succulent *.Male calyx quadripartite; corolla letrapetalous. Female calyxquadripartite; no corolla; ncctaria four; pistils four; capsulesmany-seeded. There are two species.

RHODODENDRON , Dwaiif Rose-bay; in botany, agenus of the monogynia order, and decandria class of plants;natural order, Bicornes. Calyx quimpiepartite ; corolla funnel-shaped ; stamina declining; capsule quinqueiocular. There arenine species.

RHODOPE , in fabulous history, the wife of Ilximis, king ofThrace ; who, preferring herself to Juno in beauty, was meta-morphosed into the above mountain.

RHODORA, a genus of the decandria monogynia class andorder. Calyx tive-toothed; petals three, unequal; stamina de-clined ; capsules live-cellcd. There is one species, a shrub ofNewfoundland .

RIIODLS, in ancient geography, -a celebrated island in theCarpathian Sea, 29 miles S. ot Curia, and 120 in circumference.Its chief cities were Rhodus, Lindas, Camisus, and Jalysus. It isnow called Rhodes. See Rhodes.

RHOE, two of the Shetland isles of Scotland .

RIIQiADILE, [ rhaus , Limmis’s name, after Dioscorides , forthe red poppy,] the 27th order in Linnxus’s natural method. SeeBotany .

RHOECUS, in fabulous history ; l.one of the giants, killedby Bacchus in the war against the gods: 2. a centaur who at-tempted to offer violence to Atalanta ; also killed by Bacchus, atthe marriage of Pirithous.

RHOKTEL M, a promontory of 'Proas, on the Hellespont ;near which the body of Ajax was buried.

RHOMB SPAR, in mineralogy, a species of the Calx genus,of a greyish colour passing to yellow ; it is never massive, but al-ways in regular, middle-sized rhombs; the lustre is splendent, andbetween vitreous and pearly ; it is brittle, easily irangible ; speci-fic gravity 2.5 ; it is infu-iblv, without addition. With acids, it

produces very little effervescence, even when pulverized. Con-stituent parts:

Carbonate of lime. 52

Carbonate of magnesia.45

Oxide of iron and manganese. 3

100

It is found in Switzerland, Sweden , and in chlorite rocks, onthe banks of Loch Lomond in Scotland .

Rhomb , Solid, consists of two equal and right cones joined to-gether at their bases.

RHOMBOIDES, in anatomy, a thin, broad, and obliquelysquare fleshy muscle, situated between the basis of the scapula andthe spina dorsi; so called from its figure. Its general use is todraw backward and upward the subspina! portion of the basis sca-puhe.

Rhomboides, in geometry, a quadrilateral figure whose oppo-site sides and angles are.gquai, but is neither equilateral nor equi-angular, as lig. 10, Plate CLVI.

RHOMBUS , in geometry,'an oblique-angled parallelogram, orquadrilateral figure whose sides are equal and parallel, but the an-gles unequal, two of the opposite ones being obtuse and two acute,as fig. 1 I, Plate CLVI.

RHONE, one of the largest rivers in France , which, risingamong the Alps of Switzerland , passes through the lake of Geneva,visits that city, and then runs S. W. to Lyons ; where, joining theSaone , it continues its course due S. passing by Orange, Valence,Vienne, Viviers, Avignon, and Arles , and falls into {lie Mediter-ranean a little above Marseilles , by several mouths.

Rhone and Loikf., a department of France , comprehendingthe late piovinces of Forez and Lyonnois. It is bounded on theN. by tile department of Saone and Loire ; E. by those of theAin, and the Isere ; S. by that of Upper Loire; and W. bythose of the Puy de Dome, and the Allier . Lyons is thecapital.

Rhone, Mouths of the, [Bouches de Rhone, '] a departmentof France , bounded on the N. E. by the department of the LowerAlps; E. by that of the. Var; S. by the Mediterranean ; and W.by the department of the Gard. It comprehends the S. W. partof the late province of Provence ; and is 53 miles long from E, toW. and 45 broad from N. to S. Aix is the capital.

RIIOPALIC VERSES, in ancient poetry, a kind of verses,which beginning with monosyllables, were continued in wordsgrowing gradually longer and longer to the last.

RHOPOGRAITII, in antiquity, painters who confined them-selves to low subjects, as animals, plants, latulskips, &c. SeePainting.

RHUBARB, [ rhubarlmrum , Lat.] in pharmacy, a thick root,of an oblong figure, large at the head, and tapering pretty suddenlyas it extends in length. It is sometimes single, but more usuallydivided into two or three parts at the lower end.

RHUMB, RUMB, or RUM, in navigation, a vertical circleof any given place, or the intersection of such a circle with thehorizon ; in which last sense rhumb is the same witli a point of thecompass. See Navigation.

Rhumb-line, [ Inxodromiu , Lat.] is also used for the line whicha ship describes when sailing in the same collateral point of thecompass, or oblique to the meridians. These rhumb-lines arcspirals, which continually approach to the pole, but never fall intoit, as A h c d efg, Plate CLYI1. fig. 1 I.

RHUS, Sumach; in botany, a genus of the trigynia order,and pentandria class of plants; natural order, Demos*. Calyxlive-parted; petals five; berry one-seeded. There are thirty-four species.

RHYME , RI1IME, RYME, or RIME, OV©h] in poetry,is a similitude of sound between tiie last syllable or syllables of averse, succeeding either immediately or at the distance of two orthree lines. See Poetry.

RHYTHM, in music, the variety in the movement, as to thequickness or slowness, length oi shortness, of the notes. Or it maybe defined more generally, the proportion which the parts of themotion have (o each other.

Ill ALEXA, a town of Mexico, in Nicaragua , sixty miles W.of Leon and of Lake Nicaragua . Lon. 89. 10, W. Lat. 12. 25. N.

lUA/.AN,