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ferent reigns, according to circumstances, which we need notquote.

Regent also signifies a professor of arts and sciences in a col-lege, having pupils under his care ; hut it is generally restrainedto the lower classes, as to rhetoric, logic, &c. those of philosophybeing called professors. In the English universit es it is appliedto Masters of Arts under five years standing, and to Doctors undertwo, as non-regent is to those above that standing.

REGGIO, a late duchy of Italy , bounded oh the W. by thatof Modena . It is fertile in fruits, &c. and famous for its manufac-tures of silks.

Rec.gio, an ancient, handsome, and strong town of Italy , capi-tal of the department of the Crrstolo, in the district and late duchyof'Reggio, 15 miles N. VV. of Modena , and 30 S. E. of Milan.Ron. It. 5. E. Lat. 44. 43. N.

Reggio, an ancient and considerable town of Naples, in Cala-bria Ultra, 12 miles S. E. of Messina.

REGIFUGIUM was a feast celebrated at Rome on the 24thof February, in commemoration of the expulsion of TarquinJI.and the abolition of regal power. It was also performed on the26th of May, w hen the Rex Sacronnn, king of the sacrifices,ottered bean Hour and bacon, in the place where the assemblieswere held. The sacrifice being over, the people hasted away withall speed, to denote the precipitate flight of Tarquin.

REGlLLrE, orREGILLU.M, an ancient town of Italy , in thecountry of the Sabines, famous for a battle fought near it, A. U. C.258, between 24,000 Roman republicans, and 40,000 Etrurians,headed by the Tarquins. The Romans obtained so completea"victory, that hardly 10,000 of the Etrurians escaped. Livy ii.c. 16.

REGIMEN, irt medicine. See Abstinence, Aliment ,Diet, Drink, Food, and Medicine. The vicissitude of exer-cise and rest forms also a necessary part of regimen. See Exer-cise. In cases of age or extreme weakness, where there is notsufficient strength to bear exercise, frictions with the flesh-brushare proper.

Regimen, in grammar, that part of syntax, or construction,which regulates the dependency of words, and the alterations whichone occasions in another.

REGIMENT, a body of men, either horse, foot, or artillery,commanded by a colonel, lieutenant-colonel, and major. Eachregiment of foot is divided into companies. In Britain our re<d-inents are generally ten companies, one of which is always grena-diers, exclusive of the two independent companies. Regimentsof horse are commonly six troops, but there are some of nine.Dragoon-regiments are generaity in war-time eight troops, and intime of peace but six. F.adli regiment has a chaplain, quarter-master, adjutant, and surgeon. Regiments were first formed inFrance in 1558, and in Englahd in 1660.

REGION, in geography, a large extent of land, inhabited bymany people of the same nation, and inclosed within certainbounds!

Region, in anatomy, a division of the human body, otherwisecalled cavity, of which anatomists reckon three, viz. the upperregion, or that of the head ; the middle, region, that of the tho-rax or breast; and the lower, the abdomen, or belly. See Ana-tomy.

Region, in ancient Rome , was a part or division of the city.I he regions were only four in number, till Augustus Cssar’s time,'U'o divided the city into fourteen ; over each of which lie settledtwo surveyors, called curatores viarum, who were appointed an-n ‘tally, and took their divisions by lot.

Region, in physiology, is taken for a division of our atmo-sphere, which is divided into the upper, middle, and lower regions,bee Atmosphere.

rlEGioN, JEthereal, in cosmography, is the whole extent of

he universe, in which is included all the heavenly bodies, and eventhe orb of the fixed stars.

Region, Elementary, according to the Aristotelians, is a■phere terminated by the concavity of the moon’s orb, compre-

'kri'ie' 6 'atmosphere of the earth.

U.GIS 1 ER, a public book, in which are entered and record-

< memoirs, acts, and minutes, to be had recourse to occasionallyan< * P roY mg matters of fact. Of these there are se-

Registers, in chemistry, are holes, or chinks with stopples,contrived in the sides of furnaces, to regulate die fires; that is, tomake the heat more intense or remiss, by opening them to let inthe air, or keeping them dose to exclude it. There are also regis-ters in the steam-engine.

Register-Ships, in commerce, are vessels which obtain a per-mission either from the king of Spain , or the council of the Inches,to traffic in the ports of the Spanisli West Indies; which are thuscalled, from thi-ir being registered before, they set sail from Cadiz for Buenos Ayres.

REGISTRAR, an officer in the English universities, who hasthe keeping of all the public records.

REGIUS PROFESSOR, in universities, a professor appoint-ed by royal authority.

REGNANO, a town of Italy, in the late Pope ’s dominions,and province of Patrimonio, near the 'Tiber, 17 miles N. of Rome .Lon. 12.36. E. Lat. 42. II. N.

REGNI, an ancient people of South Britain, who inhabitedthe country, now called Surrey, Sussex, and the coast of Hamp-shire , and resided next to the Cantii, the ancient inhabitants ofKent.

REGNUM, in ancient geography, a town of South Britain,the capital of the Regni, situated, by the Itinerary numbers, onthe confines of Belgae, in a place now called Ringwood, in Hamp-shire , on the Avon, running down from Salisbury, and about tenmiles from the sea.

REGOLETS, the passage from tiie N. part of the Gulf ofMexico , into lake Pont-Chartrain ; which communicates throughlake Maurepas, and the strait of Ibberville, with the Missis-sippi .

Regolets is also the general name of the isles in the inner partof the passage into lake Maurepas.

REG RATER, or REGRATOR, is one who buys and sellsany wares or victuals in the same market or fair, such as grain,fish, butter, cheese, sheep, lambs, calves, swine, pigs, geese, ca-pons, hens, chickens, pigeons, conies, or other dead victuals what-soever, brought to a fair or market to be sold there, and tio sellthe same again in the same fair, market, or place, or in someother within four miles thereof. Regrators are punishable by lossand forfeiture of goods, and imprisonment, according to the first,second, or third oflence, &c. See Engrosser, Forestaller,and Forestalling.

REGULAR FIGURE, in geometry, is one whose sides, anilconsequently angles, are equal; and a regular figure witli three orfour sides is commonly termed an equilateral triangle or square, asall others with more sides are called regular polygons.

REGULATOR OF A WATCH, the small spring belongingto the balance ; serving to adjust its motion, and make it go fasteror slower. See Watch.

REGULBIUM, or REGULV1UM, an ancient town of theCantii, in Britain , mentioned in the Notitia Imperii, and no whereelse more early. Now called Reculver.

REGULUS, in the old system of chemistry, was a name givento a metallic substance that falls to the bottom of the crucible, inthe melting of ores, or impure metallic substances. It is thefinest or purest part of the metal; and, according to the alche-mists, was denominated regultis, or little king, as being thefirst-born of the royal metallic blood. To procure the regulusof metals, flux-powders were commonly used ; as nitre, tar-tar, Ac.

Regulus, in astronomy, a star of the first magnitude, in theconstellation Leo , called also, from its situation, cor leonis, or, thelion’s heart. Its longitude, in the beginning of 1811, was SI27° 12" 7",8, and its latitude 0° 27' 35",9 N. Its annual in-crease of longitude is 50",004, and its annual variation in lati-tude + 0",2. , , ,

REH EARSAL, in music and the drama, is an essay or experi-ment of some composition, generally made in private, previous toits representation, or performance in public, to render the actorsand performers more perfect in their parts.

REICH EN EU, a town of the Helvetic republic , in the countyof the Grisons, 7 miles S. W. ot Coire .

Reicheneu, an island of Germany in Suahia, in the Zeller Zee,or Lower Lake of Constance.

REICHENBACH;