RUE 



624 



RHI 



excise, customs, duties, rents, &c., which 

 ii nation or state collects into the treasury 

 for public use. 



REVEK'BERATORT. A furnace or oven, 

 wherein the flame or current of heated 

 gases from the fuel is caused to reverbe- 

 rate, or be reflected down upon the sub- 

 stance under operation, before passing 

 into the chimney. Such reverberatories 

 are therefore usually made with dome- 

 tops, against which the flames, &c. first 

 impinge, and then curve downwards up- 

 on the bed of the furnace. 



REVERSE', Fr. revers. In numismatics, 

 the side of a coin or medal on which the 

 head or principal figure is not stamped. 



REVER'SION. In law, the residue of an 

 estate left in the grantor, to commence in 

 possession after the determination of some 

 particular estate granted by him. In an- 

 nuities, a payment or benefit which is de- 

 ferred till the happening of some event, 

 as the death of a person now living. 



REVET'MENT, Fr. revttement,trom revttir. 

 In fortification, a strong wall on the out- 

 side of a rampart, intended to support the 

 earth : a retaining- wall. 



REVISE', from revisus. In printing, a 

 second proof of a sheet, taken after the 

 corrections in the first. 



REVOCATION (POWER OF). In law, a 

 power by which the grantor of a vohm- 

 tary deed of conveyance to uses, retains 

 the liberty of revoking these uses. 



REV'OLCTE, Lat. revolutus, rolled back. 

 In botany, applied to leaves, when the 

 margins are rolled backwards to wards the 

 under surface. 



RHABAR'BARINE. The bitter principle 

 of rhubarb, called also caphopicrite. 



RHAB'DOMANCY, gajSSas, rod, and U.O.M. 

 m, prophecy. Divination by a wand. 



RHACHI'TIS. English disease: the 

 rickets, so called from rachis, the spine ; 

 because with the other deformities cha- 

 racteristic of this disease, the spine is 

 often distorted. 



RHAM'NU>. The Buck Thorn. An ex- 

 tensive genus of trees and shrubs. Pen- 

 tandria 3lonogynia. Name pauvs?, 

 borrowed from the Greeks. The purging 

 buckthorn, and berry-bearing or black 

 alder, are the British types of the genus. 

 The jujube-tree is now separated from 

 the genus. 



RHAPOS'TICINE. A substance extracted 

 from rhubarb (the root of the Rheum rha- 

 ponticum), otherwise called rheine (q.v.). 



RHAT'ASY. In pharmacy, the root 

 of a tree, the Krameria, imported from 

 Peru. 



RHE'INE. A substance obtained from 

 rhubarb (rheum), by treating it with 

 ether: otherwise called rhaponticine. 

 It is obtained in minute crystalline 

 grains, having an intense yellow colour, 



but no taste or smell. Its solution in al- 

 cohol reddens litmus paper, and, indeed, 

 behaves with bases like other acids. It id 

 remarkable as a solvent of iron. 



RHE'UM. 1. Rhubarb. A genus of per- 

 ennial plants. Enncandria Irigynia. 

 Name said to be from Rha, a river in 

 Russia (the Wolga), on the banks of 

 which the species grows plentifully. The 

 roots of several species are used in phar- 

 macy under the name of rhubarb, espe- 

 cially the roots of the Rh. palmatum and 

 the Rh. rhaponticum. Of the first there 

 also appears to be varieties ; the Turkey 

 rhubarb, the Russian or Tartarian rhu- 

 barb, and the Chinese or East Indian 



rhubarb. 2. "Put/jtM, Defluxion. A 



thin watery matter, arising through the 

 glands, chiefly about the mouth. 



RHEU'MATISM, pus pan a- [AV;, from pjti- 

 fj.a.Ti^v, to have defluxion. A disease ; 

 an affection of the extremities and exter- 

 nal coverings of the human body, occu- 

 pying the muscular, tendinous, and fibrous 

 textures, and characterised by pain, stiff- 

 ness, and swelling of a joint, with or 

 without fever. 



RHINOC'EROS. A genus of large mam- 

 malia. Order Pachydermata ; family Or- 

 dinaria, Name from piv, a nose, and 

 x-tof, a horn. There are several species 

 found in India, Java, Africa, and Suma- 

 tra; and fossil remains of the animal are 

 found in several parts of Europe. The 

 Indian species has only one horn on the 

 snout, that of Africa has two. But it 

 would appear, from the account of 

 Burchell and Campbell, that the one- 

 horned rhinoceros is also found in Africa. 



RHINOT'RAGUS. A gen us of coleopterous 

 insects, belonging to the tribe of Ceram- 

 bycini, characterised by the head being 

 narrow, and prolonged anteriorly, in the 

 manner of a snout : whence also the 

 name. 



RHIPIP'TERA. An order of insects, esta- 

 blished by Mr. Kirby, under the name (if 

 Strepsiptera (twisted wings), on certain 

 species remarkable for their anomalous 

 form and irregular habits: called Rhip- 

 iptera by Latreille, from p;a, a root, and 

 JTT{|V, a wing, on account of the pecu- 

 liarly radiating nervures which charac- 

 terise the wings. 



RHIZAN'THE-E, pii^ae,, root, and cctBof, 

 flower. A class of plants which appear 

 to be intermediate between Endogens 

 and the lower orders of vegetation. 



RHIZOPH'ORA. The Mangrove-tree: a 

 genus. Dodecandria Monocjynia. Name 

 from p/^, a root, and Qteu, to bear. 

 The juice of the root is applied in India 

 to the bite of serpents. 



RHiz'opoDEs,from p^a, a root, anc" <TMC, 

 a foot. A name proposed by M. Dujar- 



