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happened on the 24th May, 1792. In 1783 the House of Assem-bly, in Jamaica , vot'd lOUOf. towards erecting a marble-statue tohim, as a mark of their gratitude and veneration for his gallantservices, so timely and gloriously perionned lor the salvation ofthat island, the West India islands, and trade in general.

Rodnevt Point, a cape on the N. W. coast of N. Ame-rica, and tiie N. point of Norton Sound . Lon. 166. 3. W.Lat. 64. 30. N.

ROD.LUGUES KEY, a pretty large island on the coast otFlorida ; one of the Tortugas. The roots of the trees are over-flowed. • I.on. 81. 17. W. Lat. 25. 0. N.

ROELLA, in botany, a genus of the monogynia order, andpentandria class of plants;. natural order, Campanaceai. Corollafunnel-shaped, with its bottom shut up by staminilerous valvules ;stigma bifid.; capsule two-celled, cylindrical, inferior. It has fivespecies.

ROEMER, Olaus, a noted Danish astronomer and mathe-matician, was born at Arthusen in Jutland , 1644 ; and at 18 yearsof age was sent to the university of Copenhagen . He studiedmathematics and astronomy, and became so expert in thosesciences, that when Picaid was sent by Lewis XIV. in 1671, tomake observations in the north, be was greatly surprised andpleased with him. He engaged him to return with him to France ,and had him presented to the king, who honoured him with thedauphin as a pupil, and gave him a pension. He was joinedwith Picard and Cassini, in making astronomical observations ;and in 1672 he was admitted a member of the Academy ofSciences. During the ten years he resided at Paris , he gainedgreat reputation by his discoveries ; he first found out the velo-city with which light moves, by the eclipses of Jupiter ’s satellites.In"l681, Roemer was recalled to Denmark, by Christian V. whomade him professor of astronomy at Copenhagen , and chancellorof the exchequer, See. He became counsellor ol state, and bur-gomaster of Copenhagen, under Frederic IV . He died Sept. 19,1710, aged 66. Ilorrebow, bis disciple, professor of astronomyat Copenhagen , published, in 4to, 1753, various observations ofRoemer, well his method, under the title of Basis AslrOnanns.He had also printed various astronomical observations and pieces,in several volumes of the Memoirs of the Royal Academy ofSciences at Paris , 1666, particulajly vol. 1 and 10.

ROER, or RUER, a river of Westphalia .

Rof.r, a department of France , comprehending the late duchyof Juliers , that part of the late electorate of Cologn, which lies onthe left bank of the Rhine; with Gueldres, Moeurs, and Cleves.Juliers is the capital .

ROEUX, a handsome town of France , in the department ofJemappes, and late province of Austrian Jrlajnault: 8 miles N. E.of Mons . Lon. 4. 12. E. Lat. 50. 31. N.

ROGA, in antiquity, a present which the emperors made tothe senators, magistrates, and even to the people ; and the popesand patriarchs to their clergy.

ROGATIO, or ROGATION , in the Roman jurisprudence, ademand made by the consuls or tribunes of the Roman people,"'hen a law was proposed to be passed, llogalio is also used forthe decree itself made in consequence of the people’s giving theirassent to this demand; to distinguish itself from a senatus consul-turn, or decree of the senate.

Rogation-Week , the week immediately preceding Whitsun-day; thus called from three fasts observed therein, the^Mondav,Tuesday, anti Wednesday, called rogation-days, because of theextraordinary prayers and processions then made for the fruits ofdie earth, or as a preparation for the devotion of Holy Thurs-day.

Rogue, in law, an idle sturdy beggar ; who by ancient sta-tutes is for the first offence called a rogue of the first degree, andpunished by whipping, and boring through the gristle of the righttyjr with a hot iron ; and for the second offence, is termed a rogue? die second degree ; and, if above 18 years of age, ordered totoe executed as a felon.

r HAN, in geography, a town of France , in the departmentlorb.han, and late province of Bretagne ; 20 milesN. of Van-^oti'uut' w - Lat. 48. 0. N.

»nn Y. 1 ’ James , a celebrated Cartesian philosopher, the

a ,°f Amiens , where he was born in 1620. He be-

■*voL We Skhctl in lhe Htathematies, and taught them at Paris ,

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where he became acquainted with M. Clcrselier, an advocate,whose daughter he married. He taught philosophy in the samecity with uncommon applause. He there improved the arts, andgave excellent lectures to the artists and workmen. Fie died atParis in 1675. He wrote, in French , 1. A Treatise on Natural'Philosophy. 2. The Elements of She Mathematics. 3. A Treatiseon Mechanics, which is very curious. 4. Philosophical Conversa-tions ; and other works, His Physics were translated into Latin, 'by Dr. Samuel Clarke, with notes, in which the Cartesian errors'are corrected upon the Newtonian system.

ROHILCUND, or ROHILLA, a territory of Hindostan Proper, inhabited by theRohillas. It lies E. of Delhi ; and is subject■to the Nabob of Oude. The capital is Bereiliy.

ROHRIA, in botany, a genus of the triandria monogyniaclass and order. Calyx bell-shaped, five-parted; corolla five-petaled,. unequal ; stigmas three, revolute ; capsule. There isbut one species, viz. R. petiolifiora, a native of the woods ofGuiana .

ROLANDRA, in botany, a genus of the polygamia segregataorder, and syngenesia class of plants; natural order, Compositv.Florets bundled into a head with scales interposed ; calyx par^tial, two-valved, one-flowered; corollets hermaphrodite"; downnone. There is hut one species, viz. R. argentea, a native of theWest Indies .

ROLDUC, a town of France in the department of the. Curie,and late duchy of Limburg; with a castle, seven miles N. of Aixla Chapelle . Lon. 6. 6. E. Lat. 50. 55. N.

ROLL, a term used for a list of the names of persons of thesame condition, or of those who have entered into the same en-gagement. Thus a court-roll of a manor, is that in which thenames, rents, and services, of each tenant are copied and en-rolled.

Roll, in law', signifies a schedule of parchment which may berolled up by the hand into the form of a pipe. In these schedules,all the pleadings, memorials, and acts of court, are entered andfiled by the proper officer; which being done, they become re-cords of the court. Of these there are in the’exchequer severalkinds, as the great wardrobe-roll, the cofferer’s roll, the subsidy-roll, Sec.

Roll, in manufactories, something wound and folded up in acylindrical form. Few stuffs are made up in rolls, except satins,gauses, and crapes ; which are apt to break, and take plaits not'easy to be got out, if folded otherwise. Ribbons, laces, galloons,and paduas of all kinds, are also thus rolled.

Roll, or Roller, is also a piece of wood, iron, brass, &c. of acylindrical form, used in the construction of several machines, andin several works and manufactures. Thus in the glass-manufac-ture they have a running roll, which is a thick cylinder of cast brass,which serves to conduct the melted glass to the end of the table onwhich large looking-glasses, &c. are cast. Goldsmiths and foun-ders also use a roll to work the sand which they use in makingtheir moulds.

Roll, Calves-head, a roll in the two temples, in which everybencher is taxed yearly at 2s. every barrister at Is. 6d. and every'gentleman under the bar at Is. to the cook and other officers ofthe house, in consideration of a dinner of calves-heads provided inEaster term.

Roll, Muster, that in which are entered the soldiers of everytroop, company, regiment, &c. As soon as a soldier’s name iswritten down on the roll, it is death for him to desert.

Roll of Parchment , denotes the quantity of sixty skins. Theancients made all their books up in the form of rolls ; and inCicero’s time the libraries consisted wholly of such rolls.

Roll of Tobacco is tobacco in the leaf, twisted on the mill,and wound twist over twist about a stick or roller. A great dealof tobacco is sold in America , in rolls of various weights; and itis not till its arrival in England, Spain, France, and Holland , thatit is cut.

Roll, RroER, a schedule of parchment frequently sewed oradded to some part ot a roll.

Rolls, in baking, bread rolled in an oval form.

Rolls, in flatting-mills, &c. are two iron-instruments of a cy-lindrical form, which serve to draw or stretch out plates of goldsilver, and other metals. 6 1

Rolls, in sugar-works, are two large iron-1 arrels whicn serve t*6K bruise