L U R 



L U N 



t ted without fome degree of fridlion ; and are undoubtedly 

 J eieftrical, as a cat's back has been found ftrongly elcflrical 

 when ftroaked. See Ei.ectuicitv and Light. 



Human bodies not only appear Kiminous, but even the 

 exhalations from them adhering to their clothing will caufe 

 it to fhine likewife. 



LUMINOUSNESS oftk- Sea. See Light and Sea. 



LUMIO, in Geography, a town in the ifland of Corfica ; 

 5 miles N.E. of Calva. 



LUMME, in Ornlihohgy. See Coly.mbus TrrAk. 



LUMO, in Geography, a town of the ifland of Cuba ; 

 4j miles S.S.W. of Havannah. 



LUMP- Fish, in Ichthyology. See CvfxopTERvs 

 Lumpiis. 



Lump of Fltjl},/m the Manege. See Bouillon. 



LUMPARAN, in Geography, an ifland of Sweden, eaft 

 of Aland, between th.e B:titic and the gulf of Bothnia. N. 

 lat. 60' 7'. E. long. 20' 3'. 



LUMPEN, in Ichthyology, the name of a fifli, common 

 in the markets at Antw-erp, of a long and round body, 

 growing gradually flenderer to the tail. Its colour is a 

 greenilh-yellow, with black broad lines on the back, placed 

 tranfverfely ; and it has a little rednefs at the end of its 

 tail. 



The lumpen is a fpi-cies of the b'enni, diftinguKhcd by 

 Artedi by the name of the blemiius, with fins like cirri 

 under its neck, and traiifverfe Itreaks on the back. The 

 •cirri are bifid. 



LUMPOKOLSKOI, Niznei, in Geography, a town 

 of Rufila, in the government of Tobollk, on the Oby. N. 

 lat. ei"". E. long. 76- 54'. 



LuMPOKOLSKOI, Verchne}, a town of RufTia, in the go- 

 •vernment of Tobollk. N, lat. 60 54'. E. long. 78^ 22'. 



LUMPS, in Rural Economy, a term made ufe of to 

 fignify barn-floor bricks, in fome places. 



LUNA, in AJlronomy. See Moon. 



Lu.v.'i, in Ancient Geography, Lunegiano, a town fituated 

 on the Macra, which had a port in Liguria, called " Lunse 

 Portus," which, according (O Strabo, was a very largo and 

 fine harbour, containing feveral others. The town was 

 fituated to the weft of the mouth of the river Macra, and 

 was afterwards called " Cariaram," both names alike figni- 

 fying Luna, the moon, and referring to its form, wtiich 

 was that of a crefcent. Lucan fpeaks of its arufpices ; 

 Servius and Martial of its chcefe, marble, and wine. Ac- 

 cording to Strabo, it was deft.royed by Nero ; and fome of 

 its ruins are ftill vifible in a place called Lunigona, and its 

 fmall territory is named Lunegiano. M. Gebelin conjec- 

 tures that the name Luna was derived from the Celtic lun, 

 water. 



LuKA, in Geography, a town of Spain, in Arragon ; 22 

 miles W. of Huefca. — Alio, a town of Lithuania, in the 

 palatinate of Troki ; 16 miles S.E. of Grodno. 



LuN.\ Cornea, in Chcm'ijlry, is the combination of marine 

 acid with filver, or the white curdy precipitate of muriat of 

 filver, which takes place, when the nitrat, acetat, or any 

 other foluble fait of filver comes in contaft with muriatic 

 acid, either finglo or in any foluble combination. See 

 Silver. 



To make this combination, the filver is firft diffolved in 

 nitrous acid ; to this folntion marine acid, or more ufually 

 common fait diflblved in water, is added. The mixture 

 "foon becomes turbid, and a copious precipitate is formed in 

 it, which has always the appearance of curd. The folution 

 ef fait is added, till no more precipitate is formed. The 

 precipitate, when feparatcd from tlic liquor that fwims over 



it, is called luna cornea ; becaufe if this matter be expofed 

 alor.e to fire, the acid carries off with it a portion of the 

 filver, and the remaining matter melts, afl'uming the form 

 of a horny fubflance. 



The bell method of reducing luna cornea, or of fcparating 

 filver from marine acid, according to Margraaf, is to diflblv^ 

 half an ounce of fine filver in aquafortis, to precipitate it 

 by a fca-falt, ai.d edulcorate tlie precipitate, which will 

 tlien weigh five drams fixteen grains. For the reduction of 

 this precipitate, mix it with an ounce and a half of dry vo- 

 latile fal ammoniac, triturate them well together with a little 

 water during a quarter of an hour ; then add three ounces 

 of mercury obtained from cinnabar by means of- quick-lime, 

 and continue to triturate during fome hours with a little 

 more water. Thus an amalgam will be formed, which 

 being vvaflied from a while powder and dried, will weigh 

 three onnces and half a dram. By diilillation of this amal- 

 gam, a refidiuim of filver, four grains lefs than tlie original 

 half ounce, will be obtained. By fubliming the white pow- 

 der, which weighs five drams, three grains of filver will be 

 obtained ; but if the amalgam and white powder be diltiiled 

 togetiicr, the operation will fail, and the luna cornea be 

 recompofed. (Berlin Mem. 1749.) M. Beaume fays, that 

 luna cornea may be reduced without lofs by fufion with four 

 times its weight of, fixed alkali. 



Luna cornea mixed with fea-falt and tartar rubbed on 

 brafs gives a filver-Iike appearance ; and is the fiibllance em- 

 ployed for the filvering of the dial-plates for clocks. A 

 more fubflantial filvering may be given by the above mixture, 

 if t!ie piece of brafs to be filvered be previoufly heated con- 

 iiderably, and cleaned with a fcratch brufti ; and if the ope- 

 ration be repeated, till the filver fecms to be fufiiciently 

 thick. The brafs having a flronger difpofition to unite with 

 the marine acid than the filver has, feparates this acid from 

 the filver, which is then precipitated upon the furface of 

 tlie brafs plate. The luna cornea will alfo ferve in exami- 

 nation of mineral waters, or of any other liquor, t» diflblve 

 if they contain marine acid in whatever bafe it be engaged, 

 except metallic bafes; for if thefe waters contain the fmalleft 

 quantity of marine acid, a luna cornea will be precipitated 

 by them .from a folution of filver in nitrous acid, and this 

 luna cornea is known by its acid-like appearance. Macquer,- 

 Cliem. DliS. Engl. edit. 



Luna, Cryjlah of. See Cry.stal. 



Luna, Vitriol of. See Vitriol. 



Luna, in Ichthyology. See Zeu.s luna. 



Luna Marina, a name by which Gcfner has called a 

 peculiar fpecies of ftar-fifli, called alio the fa-fun. See- 

 SoLElL cle Mcr. 



LuN.l Pifcis, a nanie by which fome have called the inola, 

 which we ufually call in Englith ihc fun fi/h. Sec Tetko- 

 DON mola. 



Lux.?;, Lac. See Lac lims. 



LUNACHI, in Geography, a town of Chili; 42 miles 

 E.N.E. of Valparaifo. 



LUNAGUANA, a town of Peru, in the audience of. 

 Lima; So miles S.S.E. of Lima. 



LUN.-\HOLM, a fmaU ifland among the Siietlands,- 

 N. lat. 60 '44'. W. long. 1° 16', 



LLTNALE Bezoardicum. See BrzoARBicusr. 



LUNAN Bay, in Geography, a bay on the E. coafl of 

 Scotland, celebrated tor its lecurity againtl all but eallerly. 

 winds; four miles S. of Montrofe. N. lat. 56 37'. W. 

 long. 4- 17'. 



LUNANESS, a cape on tlie E. coaft of Shetland. N. 

 lat. 6o'"43'. W. long i- 17'. 



LUNAR, 



