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Show [ 102 ] \Vho glide unfeen, on printlefs flippers borne, Beneath the waving grafs, and nodding corn ; Or lay your tiny limbs, when noon-tide warms, Where fhadowy Cowflips fl:retch their golden arms,- So, mark'd on orreries in lucid figns, 505 Starr' d with bright points the min1ic zodiac ihines ; Borne on fine wires amid the piB:ured ik.ies With ivory orbs the planets fet aad rife ; Round the dwarf earth the pearly 1noon is roll' d, And the fun twinkling whirls his rays of gold.- . 510 Call your bright myriads, march your 1nailed hofis, With fpears and helmets glittering round the coafl:s; 'fhick as the hairs, which rear the Lion's mane ' Or fringe the Boar, that bays the hunter-train ; 'Vatch, where proud Surges break their treacherous mou~ds .i\.nd fweep reGfl:lefs o'er the cultur' d grounds ; 5 I 6 Such as erewhile, i1npell'd o'er Belgia's plain, Roll' d her rich t:uins to the infatiate Main ,. s~ »lark'd on orrrries. I. sos. The fi ri1 orre ry was coni1ruCl: nnthematician born at Lichfield. and 11 d . ed by a Mr. Rowley, a }ohnfon 's Dictionary. ' 0 name from his patron the Earl of Orrery. ' ( IOJ ) With piles and piers the ruffian Waves engage, And bid indignant Ocean fl:ay his rage. "Where, girt with clouds, the rifted Mountain yawns, And chills with length of ihade the gelid lawns, Climb the rude fl:eeps, the granite-cliffc; furround, Pierce with fl:eel points, with wooden wedges wound; Break into clays the foft volcanic :f1aggs, 52 5 Or melt with acid airs the marble craggs ; Crown the green fumn1its with adventurous flocks, And charm with novel Rowers the wondering Rocks. Tht granite-cliffs. I. 523. On long expofure to air the gra nites or porphories of this country exhibit a ferruginous crult, the iron being calcined by the air firfl. becomes vifible, and is then wa{hed away from the external furface, which becomes white or grey, and thus in time feems to decompofe. The marbles fccm to decompofe _by loafing their carbonic acid, as the outf!de, which has been long cxpofed to the a1r, does not feem to effervefce fo haflily with acids as the parts more w;:c ntly broken. T he immenfe quantity of c:.ubon·c acid , which exii1s in the many prov inces of lime-i1one, if it was extricated and dccompofcd would afford charco:ll enough for fu el for ages, or for the production of new vegetable or animal bodies. The volcan ic flaggs on Mo~nt Vefuvius are faicl by M. Ferber to be changed into clay by means of the ful ph11r-ac1d, and even pots made of cby and bnrnt or vitrified arc fa id by him to be again reducible to ductile clay by the volcanic i1eams . Ferber's T1avels through Italy, P· 166. W?oden wedges w ound. I. 524. It is ufual in fepa rati ng lnrge mill-i1ones from tt_1e fil iceous fancl -rocks in [orne parts of Derbyfhi rc to bore horizontal holes under them _1n a circle and fi ll thefc with pegs made of dry wood, which grad ually fwe ll by the moifture of 'the earth, and in a day or two lift up the mill -!lone without bre:~king it. |