G L A 



are pendent from the bafe of the lower rr.andiblo on eacli fule, 

 and in texture rcfL-mbk the wattle of tlie common cock ; 

 the colour at firll blue, and afterwards fine orange. The 

 irides fine blue. From the forehead to the eye the colour is 

 deep black : the other parts of the plumage dark afli-colour. 

 The tail long, wedgc-thapcd, and compofed of twelve 

 feathers. Legs long, and the hind claw much longer than 

 the reft. 



This bird inhabits New Zealand, where it fubfifls on 

 berries and infedls, and is fometimcs feen perched on trees, 

 though rarely, as it is ufually feen walking on the ground : 

 its note is a kind of whiftHng or rather murmuring noife ; 

 and the flefli favour)- and delicate. 



GLAUCUM, in jindent Geography, a promontory of 

 tlie Libvan nome, on the confines of Marmariea and Egypt, 

 upon wliieh was a town, of the fame name. Ptolemy. 



GLAUCUS, a river of the Peloponnefus, in Achaia, 

 near Patras. Paufanias. — Alfo, a river of Afia Minor, in 

 Lycia, having its mouth N. E. of the town of TelmilFus, 

 jn the gulf of Glaucus.— Alfo, a river of Afia, in the 

 territory of Colchis, where it difcharges itfelf into the 

 Phafis.' Pliny. — Alfo, a gulf of Afia Minor, in a diredtion 

 fi-om N. W. to S. W. More anciently this gulf was deno- 

 minated the gulf of Telmiifus, from the name of the town, 

 lituated near its termination in the eaflern part of it. 



Gt,.\ucu.s, in Ichthyology, a fpecies of Ch/elodon ; which 

 fee. — Alio, a fpecies of iVomfcr. — Alfo, a fpecies of Falco, 

 '.vhicli fee refpeftively. 



GLAUX, in Botany, fo called by Pliny, and r^«vJ by 

 Diofcorides, is of luicertain derivation, though fome have 

 deduced its name from ikXk, imJh. Moll probably tlie 

 word glaucous is fimilarly derived, as it conveys the idea of 

 a milky green colour. — Linn. Gen. 114. Schreb. 159. 

 Tourn. 60. Willd. Sp. PI. V. I. 1210. Sm. Fl. Brit. 

 26^. Mart. Mill. Diet. v. 2. Lamarck Dift. v. 2. 722. 

 JufT. 333. — Clafs and order, Pcntandna Monogytiia. Nat. 

 Ord. Cu/ycaulhcKj:, I^inn. SaRcanis, .Tuff. 



Gen. Ch. Cal. none : unlefs the corolla be confidered 

 as fuch. Cor. of one petal, five-cleft, bell-fhaped, erect, 

 permanent, with obtufe revohite lubes. Stam. Filaments 

 five, avvl-tltaped, ereft, the length of the corolla ; anthers 

 ronndilh. PijI. Gernun ovate; (lyle filiform, as long as 

 the ftamcns ; ftigma capitate. Peric. Capfule globofe, 

 pointed, of one cell, with five valves. Seciis five, roundifh; 

 receptacle very large, globofe, bellowed tor the feeds. 



ElT Ch. Caly.x of one leaf. Corolla none. Capfule of 

 one cell, with five valves and five feeds. 



I. G. marilima. Black Salt-wort. Linn Sp. PI. 301. 

 Engl. Bot. t. 13. This is the only fpecies known, being, 

 very frequent in falt-marflies throughout Europe, and flow- 

 ering ill fimimer. The i-oot is perennial and creeping. 

 Stem about four inches high, ereil, fomewhat branched, 

 thickly covered with ovate, feffde leaves, and flefii-colourcd, 

 purpliih, or whitilh flowers Dr. Withering has remarked 

 that cows eat this herb, and that it is ufed for a pickle, 

 being found every where from Lapland to tlie Archipelago. 

 The defcription in Diofcorides, book 4. chap. 141. is fo 

 exaft that it is impofilble to be miftaken ; yet we do not 

 f.nd this plant in the Prodromus F!or:e Grxcx, becaufe Dr. 

 Slbthorp did not himf.;!f obferw it in bis journey. 



GLAZIC, in Geo^-^raphy, a fmall illa'nd in the Englifh 

 Channel, near the coall of France. N. lat. 47 26'. W. 

 long. 256. 



GLAZIER, an artilieer or dealer in glafs. 



GLAZING. The Roman method of glazing fome of 

 their urns might give our workmen a hint toward a method 

 jjrcatly fiiperior to any thing now in pradic; for the glaz- 



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ing of earthen-ware. There is a fort of red urns found 

 in Yorkfltire, which are, inllead of glazing, covered all" 

 over inlide and out with a fine coral-coloured varnifli, that 

 gives tiiem a beauty, which no earthen-ware of our times 

 can attain ; and is not only far more durable than our way 

 of doing it with lead, which is apt to crack and fly, both 

 with wet and with heat, but far more fafe and wholefome ; 

 and being well known to be a vapourable metal, and its 

 fumes very noxious, there is great rcafon to fufpecl that 

 it muft be unwholcfome when brought to the fire. This 

 ancient glazing feems to liave been done either by the 

 brufli, or elfe by dipping, for both the infide and out- 

 fide are varniflied witli equal regularity ; and fomething 

 may be gueflTed at as to the materials they uied in it, from 

 what Pliny has left us. This author occafionaliy obferves,. 

 that fuch earthen-ware as was painted with bitumen never 

 loll its beauty ; and afterwards, that it was a cuftom to 

 cover over v.hole flatues with this fort of glazing, whicli- 

 lie obferves did not only make a fmooth coat, but funk into 

 the matter of the ilone or earth, and therefore this could 

 not be likely to crack and fly off like our lead-coats on 

 plates, &c. which is merely a cruft laid over them. Hook's 

 Philof. Colled, p. 89. 



A common glazing for any kind of earthen-ware may be 

 made of white fand forty pounds, of red-lead twenty 

 pounds, of pearl-afhes twenty pounds, and of common 

 fait twelve pounds. Powder the fand by grinding it, and 

 then add it to the other ingredients and grind tliem toge- 

 tlier : after which calcine them for fome time with a mo- 

 derate heat, and when the mixture is cold, pound it to' 

 powder ; and when wanted for ufe, temper it \^ ith water. 

 Tlie proportion of thefe ingredients may be occafionaliy 

 varied. We may obferve, in general, tliat lead ought to 

 be excluded from the compofitlon of glazings, and other 

 fluxes fubllituted in its (lead. See Coi.iCA Dammonhrum. 



A tranfparent glazing may be prepared, without lead, 

 by calcining forty pounds of white fand, twenty-five pounds 

 of pearl-aflies, and fifteen pounds of common fait ; and 

 proceeding as before : and a more perfed tranfparent glaz- 

 ing may be made of fand forty pounds, of wood-aflies 

 pcrfedly burnt, fifty pounds, of pearl-aiTies ten pounds, 

 and of common fait twelve potinds. The fol owing recipes 

 are taken, for the moil part, from Kunckel, who fays- 

 tliat they are the true glazings ufed at Delft, and' other 

 Dutch manufadories. 



Glazing, Blach, is made of eight parts of red-lead, iron 

 filings three, copper-afhes three, and zaffre two meafures.. 

 This, v.-hen melted, will make a brown blaolt ; and if you 

 want it blacker, add more zaffer to it. 



Gl AZIXG, Blue, is thus prepared: take icad-aflies, or red- 

 lead, one pound, clear fand, or powdered flints, two pounds, 

 common fait two pounds, white calcined tartar one pound, 

 Venice or other glafs hal£ a pound, zaffer half a pound: 

 mix them well together, and melt them for fcveral times, 

 quenching them always in cold water. If you would, have 

 it fine and good, it will be proper to. put the mixture into a 

 glafs furnace for a day or two. 



Another blue glazing may be formed of one pound of 

 tartar, a quarter of a pound of red-lead, half an ounce of 

 zaffer, and a quarter of a pound of powdered flints, which 

 are to be fufed and managed as in the lall recipe. Or, take 

 two pounds of calcined l;ad and tin, add five pounds of com- 

 mon f;dt, five pounds of powdered flints, and of zaffer, 

 tartar, and Venetian glafs, each one pound. Calcine and 

 fufe the mixture as betore. 



Or, again, take of red-lead one part, of fand three parts, 



and of zaffer one part. For ?. violet blue glazing, take four 



8 eunccs 



