ROS 



ROS 



oil of great fragrancy, though not quite fo agreeable as the 

 rofemary itfelf ; from one hundred pounds of the herb in 

 flower were obtained eight ounces of oil ; the decotlion, 

 thus diverted of the aromatic part of the plant, yields, on 

 being infpiffated, an unpleafant bitterifh extract. Rectified 

 fpirit likewifc, diflilled from rofemary leaves, becomes con- 

 fiderably impregnated with their fragrance, leaving, how- 

 ever, in the extraft the greateft (hare both of their flavour 

 and pungency. The active matter of the flowers is fomewhat 

 more volatile than that of the leaves, the greateft part of 

 it arifing with fpirit. Tournefort obferves, that thofe forts 

 of rofemary, which produce neither flowers nor leeds, and 

 which have very hard flirubby ftalks, and long narrow 

 leaves, fmell ftrongly like camphor, and yield on diftilling 

 a large quantity, for the purpofe of obtaining their oil, a 

 portion alfo of real camphor. 



Rofemary is reckoned one of the moft powerful of thofe 

 plants which ftimulate and corroborate the nervous fyitem ; 

 it has, therefore, been recommended in various affections, 

 fuppofed to proceed from debilities, or defective excitement 

 of the brain and nerves ; as in certain head-aches, deafneffes, 

 giddinefles, palfies, &c. and in fome hyfterical and dyfpeptic 

 fymptoms. Dr. Cullen fuppofes the ftimulant power of 

 rofemary infufficient to reach the fanguiferous fyitem ; it 

 has however the character of being an emmenagogue, and 

 the only difeafe, in which Bergius dates it to be ufeful, is 

 the chlorofis. In diforders of this kind it has been given 

 in the form of infufion ; but it is now fcarcely ever pre- 

 fcribed, unlels as an odorous additament to fternutatory 

 powders. The dofe in fubitance may be from grs. x to 

 9ij, and from 3j to 3ifs in infufion. The officinal pre- 

 parations are the " oleum rofmarini," and " fpiritus rof- 

 marini." It is alfo a principal ingredient in what is known 

 by the name of Hungary Water ; which fee. 



Rosemary, Oil of, Oleum rofmarini, Lond. ; Oleum 

 fummitatum florentiumrorifmarini officinalis, Edinb. ; Oleum 

 herbae florefcentis roris marini, Dub., is prepared by dif- 

 tilling twenty-four pounds of the plant, which yield one 

 ounce of a fluid colourlefs oil, the odour of which is lefs 

 agreeable than that of the plant. It depoiits cryftals of 

 camphor when long kept. Its fpecific gravity is .934. 

 (See Oil.) This oil is ftimulant; and frequently enters 

 into the compolition of liniments. The dofe, as an inter- 

 nal remedy, may be from mij to 111 vi ; but it is fcarcely 

 ever ordered. 



Rosemary', Spirit of, Spiritus rofmarini (Lond.) is ob- 

 tained by macerating two pounds of frefh rofemary tops in 

 a gallon of proof fpirit, with water fufficient for prevent- 

 ing empyreuma, for twenty-four hours, and then diitilbng a 

 gallon in a gentle heat. Spiritus rorifmarini officinalis 

 (Edinb.) is prepared by taking two pounds of frefh rofe- 

 mary tops and eight pounds of alcohol (fpec. grav. .335), 

 and drawing off feven pounds by diflillation in a water 

 bath. Spiritus rorifmarini (Dub.) is obtained by diltilling 

 with a moderate fire five pints from a pound and a half of 

 frefh rofemary tops and a gallon of proof fpirit. Oil of 

 rofemary is fufficiently volatile to rife in diflillation with 

 rectified fpirit, which the Edinb. college has, therefore, 

 directed to be ufed. It is a fragrant perfume ; and is 

 chiefly ufed in the compound foap liniment or the com- 

 pound fpirit of lavender. Lewis Mat. Med. Woodv. 

 Med. Bot. Thomfon's Difp. 



ROSEMBERG, in Geography, a town of Pomerelia ; 

 10 miles S. of Dantzic. 



ROSEN AU, a town of Pruffia, in Oberland ; 16 miles 

 E. of Marienwerder. — Alfo, a town of Moravia, in the 

 circle of Prerau ; eight miles E. of Meferitfch. — Alfo, a 



town of Hungary, near which are mines of gold, copper, 

 quickfilver, and cinnabar ; 24 miles W. of Cafchau. 



ROSENBERG, a town of Pruffia, in the province of 

 Oberland; 17 miles E. of Marienwerder. N. lat. 53° 39'. 

 E. long. 1 9 10'. — Alfo, a town of Hungary, on the 



Waag, trading chiefly in fait; 18 miles N. of Libeten 



Alfo, a town of Bohemia, in the circle of Bechin ; 37 

 miles S. of Bechin. N. lat. 48°4o'. E. long. 14 18'. 



Rose.vberg, or Olefno, a town of Silefia, in the prin- 

 cipality of Oppeln ; 26 miles N.E. of Oppeln. N. lat. 

 50°52'. E. long. 1 8° 28'. 



ROSENBURG, a town of the duchy of Magdeburg ; 

 24 miles S. of Magdeburg. — Alfo, a fmall Dutch ifland, 

 at the mouth of the Meufe ; three miles E. of Briel. 



ROSENDAL, a town of Brabant; ij miles W. of 

 Breda. 



ROSENDORF, a town of Bohemia, in the circle of 

 Leitmeritz ; fix miles W. of Kamnitz. 



ROSENEATH, a town of Scotland, in Dumbarton- 

 fhire ; nine miles W.N.W. of Dumbarton. 



ROSENESS, a cape on the S. coalt of the ifland of 

 Pomona. N. lat. 58° 45'. W. long. 2° 42'. 



ROSENFELD, a town of Wurtemberg ; eight miles 

 S.E. of Sulz. N. lat. 48 14'. E. long. 8° 43'. 



ROSENGAT, a town of Germany, oppofite to 

 Worms. 



ROSENHEIM, a town of Bavaria, at the conflux of 

 the Inn and the Manguald ; 38 miles W. of Salzburg. 



ROSENHOF, a town of the duchy of Holttein ; five 

 miles N. of Cifmar. 



ROSEN1A, in Botany, fo called by Thunberg, in 

 honour of two brothers of the name of Rofen, both emi- 

 nent as phyficians and botanifts, one of whom is well 

 known as the determined and jealous rival of the early 

 fame of Linnseus, though afterwards his friend. (See 

 Linnjeus. ) This gentleman, who died in 1773, aged 67, 

 was profeffor of Medicine at Upfal : the other at Lund. 

 They were natives of Sweden, and knights of the Polar 

 Star. — Thunb. Prodr. pnef. n. 59. Nov. Gen. diff. 12. 



161. Willd. Sp. PI. v. 3. 2134 Clafs and order, Syn- 



genefia Polygamia Superflua. Nat. Ord. Compofit* Dif- 

 coidea, Liun. Corymbifera, .luff. 



Gen. Ch. Common talyx of many leaves, imbricated ; 

 fcales ovate, obtufe, undivided, fmooth, tranfparent, with 

 a brown, opaque, longitudinal line. Cor. compound, 

 radiated ; florets of the difk perfect, tubular, five-cleft ; 

 thofe of the radius female, ligulate, convolute, arched. 

 Stum, (in the perfeift florets) Filaments five, very fhort ; 

 anthers united into a cylindrical tube. Pifi. (both in the 

 difk and radius) Germen fmall, ftyle thread-fhaped; ftigma 

 cloven. Peric. none, except the unchanged calyx. Seed 

 (in both kinds of florets) angular, fmooth; down, of two 

 kinds of capillary fcales ; the two innermofl of the radius 

 generally fetaceous and longeft ; the outermoft capillary, 

 united at the bafe into feveral parcels. Recept. compofed 

 of lanceolate, membranaceous fcales. 



Eff. Ch. Receptacle chaffy. Seed-down of two kinds, 

 chaffy. Corolla radiated. Calyx fcariofe. 



I. R. glandulofa. Thunb. and Willd. — Native of the in- 

 terior of the Cape of Good Hope. For all that is known of 

 this folitary fpecies of Rofenia, we are indebted to the follow- 

 ing defcription of Thunberg. " Stem fhrubby, round, fmooth, 

 wavy, erect, much branched, generally more than two feet 

 high. Branches and branchlets alternate, three or four to- 

 gether, ia a clufter, fpreading, ftriated : the branchlets 

 lateral, very fhort, leafy. Leaves fomewhat cluitered, ap- 

 proximating, feffile, ovate, obtufe, undivided, flightly con- 

 cave, 



