E U D 



;t is compofed of four atoms defiant gas, and one atom of 

 hydriodic acid. 



Jcetk Ether— The original experiments of Lauraguais 

 and Scheele have been lately repeated by other chemifts, 

 and particularly by Thenard. Thenard fucceeded m form- 

 ing this ether, by repeatedly diftiHing together very concen- 

 trated acetic acid and alcohol. No gafeous produft was 

 evolved. The fuperfluous acid was neutralized by potafh, 

 and the ether finally obtained by a cautious diftillation of 

 the refulting liquid from acetate of potalli. Acetic ether thus 

 procured is hmpid and colourlefs. Does not redden vege- 

 table blues. Poflefles a peculiar talle, quite different from 

 that of alcohol. Its fp. gr. at 44^° is .866. It boils at 

 the temperature of 160°. It burns with a yellowifli-white 

 flame, and acetic acid is evolved during its combuftion. 

 At the temperature of 62°, it requires more than feven 

 times its weight of water to diflblve it. It appears from 

 thefe and other properties to be a compound of acetic acid 

 and alcohol. 



Formic Ether. — This Was firft formed by Gehlen. It may 

 be prepared precifely in the fame way as acetic ether, 

 merely fubftituting the formic for the acetic acid. 

 Formic ether has an agreeable odour, fimilar to that of 

 peach bloffoms. Its talle is likewife fimilar, leaving an 

 impreffion of ants. At a temperature of 63°, its fp. gr. 

 is .9157. It burns with a blue flame, having yellow edges, 

 and at the above temperature is foluble in nine times its 

 weight of water. This ether has not been analyfed. 



ETON, col. 3, 1. 25, r. to be feen ; 1. 57, r. 314 and 

 2279. 



EVANDRA, in Botany, from w and an^, alluding to 

 its abundant ftamens, in a tribe where three is the ufual 

 number. — Br. Prodr. Nov. HoU. v. I. 239. — Clafs and 

 order, Dodectindrla Monogynla. Nat. Ord. Calamaria, 

 Linn. Cypero'idete, Juff. 



EiT. Ch. Spikelets generally fingle-flowered ; fcales 

 imbricated, mollly empty. Stamens twelve or more. Nut 

 cylindrical, cruftaceous, without bridles at the bafe ; kernel 

 Imonth. Tall bog-plants, from the fouth coaft of New 

 Holland. Scales blackifh externally ; upper ones filky 

 internally. Somewhat allied to Chkysitrix. Tliere are 

 two fpecies. 



1. Y.. ar'ijlatn. Stem leafy. Spikelets panicled, awned. 



2. E. panajlora. Stem naked. Spikelets folitary or in 

 pairs, without awns. 



EUCHILUS, Brown in Ait. Hort. Kew. v. 3. 17, 

 feems to us a Pc ltex^a ; fee that article. 



EUCHLORINE, in Chemillry. See Oxymuriatic 

 Ac\d. ■' -^ 



EUCLID, in Geography, a townfliip of Cayahuga, in 

 Ohio, containing 283 inhabitants. 



EUCLIDIUM,"in Botany, from vj, ivell, and x.XaJ'oi,, to 

 Jbut up, becaufe of the firmly-clofed feed-veffel.— Br. in Ait, 

 Hort. Kew V. 4. 74._Clafs and order, Tetradynamia 

 Sdiadofa Nat. Ord. S\l[quoJ<t, Linn. Cruclfera, JufF. 



Ell. Ch. Pouch tumid, of two cells, with evident futures 

 hut not burfting. Seeds folitary. Cotyledons flat. 



I. Y.-fyrmcum. Syrian Euclidium. Ait. n. i. (Anaf- 

 tauca fynaca; Linn. Sp. PI. 895. Jacq. Auftr. t.6.)— 

 Pouch rough. Style awl-ihaped, permanent. Leaves lan- 

 ceolate, ftalked Native of the warmer parts of Europe. 



What the other fpecies may be we are not informed. 



EUDESMI A, from iv, ivell, and i".o-/:.io;, confned.—^vovm 

 Bot. of Terr Aullr. 67.— Clafs and order, Polyadelphia 

 rolyandrm. Nat. Ord. Hefper'idea, Linn. Myrtl, Jufl". 



Efl". Ch. Calyx foiu-.toothed, fuperior. petals clofely 

 imitf d uuo a deciduous lid, with four furrows. Stamens 



EUR 



in four fets, alternate with the calyx-teeth, combined at the 

 bafe. Capfule of four cells, opening at the top. Seeds 

 numerous. 



I. E. tetragona. Br. as above, t. 3. — In expofed barren 

 places near the fliore, about Lucky bay, on the fouth 

 coaft of New Holland, flowering and bearing fruit in 

 January. Br. A JJirub, three to five feet high, with 

 fquare, bordered branches. Leaves ftalked, ovate-oblong, 

 moftly oppofitc, coriaceous, four or five inches in length, 

 entire, glaucous, dotted with refinous points. Umbels axil- 

 lary, ftalked, of three or four jloiuers, whofe numerous 

 \\'\\\\e Jlamens fpread confpicuoufly after the lid is fallen. 

 We believe this fine plant is living in the green-houfe of 

 the Comtefle des Vandes, at Bayfwater. 



EUDIOMETER. See Laboratory, 



EUDIOMETRY. Add— See Laboratory. 



EVELYN, 1. 2, infert after Surrey — Oftober 31ft; 

 1. 4, for Chriftchurch r. Baliol college ; 1. 5, infert — fpent 

 much of his time. At the clofe of his article, add — For 

 a farther account of the life and writings of this excellent 

 perfon, we refer to the " Memoirs," publiflied from original 

 MSS. in 2 vols, by William Bray, efq. Lond. 1818. 



EVESHAM, col. 2, 1. 10 from the bottom, r. 674 

 houfes, and 3068 inhabitants. 



Evesham, in America, add — In 1810, it contained 

 3445 inhabitants. 



EUPOMATIA, in Botany, from iv, iveU, and ^ri/ixja', 

 to fl.nit up with a cover. — Brown Bot. of Terr. Auftr. 65. — 

 Clafs and order, Monadelphia Polyandria. Nat. Ord. Coa- 

 dunatte, Linn. Annonaced, De Cand. Br. 



Efl\ Ch. Calyx a fuperior, entire, deciduous lid. Co- 

 rolla none. Inner ftamens dilated, imbricated, without 

 anthers. Styles none. Stigmas numerous, deprefled. Berry 

 globofe, bordered, with many feeds, 



I. E. laur'ma. Br. as above, t. 2, — In mountainous 

 woods, and about great rivers, at Port Jackfon, flowering 

 in December and January. A flender Jlrrub, from five to 

 ten feet high, very fmooth. Leavei_^ alternate, on ftiort 

 ilalks, obovate-oblong, acute, entire, coriaceous, four or 

 five inches long. Floiuer-Jlalks axillary, fliort, bearing two 

 or three fmall leaves, and one Jloiver, whofe numerous, pale 

 yellow, perfeft Jlamens fpread, in a radiant manner, after 

 the /;'(/ is gone, difplaying the broad imperfetl ones, united 

 with them below, overlapping the Jl'igmas. Thefe fuper- 

 fluous intruders are obferved, by Mr. Brown, to be ufually 

 eaten away by infefts. Berry three-quarters of an inch 

 broad. Seeds oval, wrinkled. 



EURYALE, the name of one of the Gorgons, adopted 

 here to exprefs the thorny menacing habit of the plant. It 

 might likewife be underftood as alluding to the ample area 

 of the leaves. — Salift). in Ann. of Bot. v. 2. 73. Ait. Hort. 

 Kew. V. 3. 295. — Clafs and order, Polyandria Monogynia. 

 Nat. Ord. RhoeadciC, Linn. Hydrocharides, Juff. Nymphiteie., 

 Salift. 



Eft'. Ch. Calyx of four leaves, fuperior. Petals nume- 

 rous. Stigma feflile, peltate. Berry crowned with the 

 calyx. Seeds numerous, tunicated. 



1. E./fro.v. Prickly Euryale, Ait, n. i. Roxb. Corom. 

 V, 3. 39, t. 244. Anneflea fpinofa ; Andr. Repof. t. 618. — 

 Native of lakes and ponds in India, to the eaft of Calcutta. 

 Roxb. This has the habit of a Nymphiia. The floating 

 peltate leaves, cloven at the bafe, are from one to four feet 

 wide ; purple beneath ; their ribs, veins, and Jlalks, like 

 X\\e Jlower-Jlalks, calyx, ^nd. fruit, armed copioufly with fliarp 

 prickles. Flo-uers comparatively fmall, purple, with yel- 

 low ftamens. Fruit about two inches in diameter. Seeds, 

 or nuts, the fize of a large pea, each in a loofe coloured 



tunic. 



