I R E L A X D. 



281 



;ht over 



Sir** of 



tt.C '"I* 



m.- ! ' "-r 

 T-.anrr, 



u al 



'.'; : 

 '. . 



5. Bed of red argi 



the 



chre, <m which 

 amid the bed 





7. 8 -' Hi rious co- 



d appearance, fri- 

 able, and resembling a variety of stea- 



..'... 



-sion of 5 or 6 gross beds of table 



;ta of 

 ochre, and other lahetinTf <, occur, 1 so feet. 



Total . . . S74. feet. 



The reports of the commissioners ming and 



draining the' bogs of Ireland, (to which we have alrea- 

 dy been ii '-> add to the sketch 

 given, of the geology and mineralogy of some parts of 

 this count' 

 the northi 



the bog of that name, stratified limestone makes its ap- 

 ice, at an angle of ith a 



dip 20 east of xmth. I'..: A. _-e and the base 



of tl: Allan, hil ccur ; 



but at the base, a rock appears composed of br 

 thin beds of a deep brick red sla - '.uch inter- 



(H-r-i i! i' '. i- ( nvl intrr-tratiticd with the 



breccia. To the south rises the Hill of Allan, compo- 

 sed of an irregular unstratified maw of fine grained 

 greenstone, the crystals of hornblende and feldspar be- 

 ing very mimttt Near the summit, the rt 

 more crystalline. Detached masses of beautiful 



tic s,iunslllli, thicklv studded with large crys. 



Ispar, are frequently met on the surface. A 



hill to the south-west of i also com- 



rotation regarding the strata of part of the 

 Bog of Allan, v probable, that th, 



bogs of Ireland are similarly constituted,) wh 

 contained in the firt report of the commissioners, we 

 shall give in the words ot' that report. 



Mi the gentleman em- 



bogi included in l!ie - ,. ' : , - report is a nrv-< t' 



ness of 85 feet, nowhere leas than I . . ' r ' i md to ex- 

 ceed > - ubstancc inaterially 

 pear 



which at lies. rt - 



MHO of various spec - p t' about 1 



feet, composed of a mass u(' 

 tables in different stage* : 



ed tt< .enerally, bow. 



ever, too open 



pones of t. ., lie* generally a h^ht i 



ish brown fibresof a mo** still 



ble, though not p ruling to a further 



> instance 



section at the clou -re- 



port, are : ranches and twig* of al.ler and 



iderstand him as I* 



-case. At 

 a greater depth, the fibre* of Teg " 



ecomesb! 



iiore valuable and gradually incr. 

 gree of bUki.i - *<;\ i,,ii,p.u-tn,' proportionate to it- 



man , has a strung resvmblaii 



VOL. XII. TART. I. 



sap- 

 Ui at 



with 



- accom pa- 

 il, the characters of which 



pitch, or bituminous coal, and having a conchoidal frac- Si 

 ture in every direction, with .\ inhig lustre, and *~~~Y*~* ' 



susceptible of receiving a con.-idcrable polish. Imme- 

 diately below this lower stratum, there is generally 

 found a thin stratum of yellow or blue clay, varying in 

 thickness from one to six feet. In some places, the 

 peat rests on a thinner stratum of yellowish white marl, 

 iiing on jii about b'O per cent, of calcare- 



ous matter. This stratum of clay in this district, uni- 

 y rests on a solid mass of clay and limestone 

 gravel mixed togclher, and extending to an unknown 

 depth." 



Recent researches have discovered some rare mine- Rare mine- 

 rals in Ireland, which it will be proper briefly to no- "Is. 

 tice here. Ve-uvi.iti has been found at Kilrunclagh, in 

 a rock i nf common garnet, quartz, and feld- 



spar. The crystalline form of the \T-u\ian, however, 

 ited. (irenatite occurs in a micaceous 

 compound, in the lead mines in the county ofWicklow. 

 The precious beryl has been found imbedded in granite 

 near Lough Bray ; and cronebane in the same county, 

 and in the Dublin mountain- near Dundnim. The 

 Douce mountain, in the county of \Vickiow, is compo- 

 ite, in which andalu-ite has been 



found. A variety of the same mineral I .'.nind 



in great abui nty of Dub- 



lin. The andalu-ite of 

 ...i/i'il 11 



have much atfinity to those of indurated talc, the occur- 

 rence of which in crystals has hill., rare, 

 li-tinct specimtn- of holluw spar have been found 

 at and near lialtinglass, in the county of U it-Mow, 

 ranite, has been found near 

 i the cou- iwn. The granular sul- 

 phate of barytes, accotn pan .is been 



Uy ; anil \Vavellitc, 



very similar in its external characters anil analysis to 



;ite of Devonshire, as dc-cril>cd by Sir M. 



. has been found about ten miles south-east from 



.lie granite 



jaspers of various sizes have been 



discovered, ad in yellow clay. 



kirry is rrniarkabl' parent re- 



cryatala, known under the name ot' Kerrv -tones. 

 They are harder, larger, and posies* more brilliancy, 

 Bristol stoof* Amtthy-ts have been disco- 

 vered in the clefts near Kerry ' 



e, at different times, been Gold. 



cred in a from 



i" ^i i ,i 



( ronelinnc. and .. : ; ' 'leclmtyol a i:,. > -in'.. tin. -run 



miles west of A- ' ; >out 



r:h hile 



to pro-ecutf tile -i-jrch lur yold here ; but it was MHIII 



the 



snTpOsVn Consider. ti ties of silver appear for- Silver. 



jve been obtained from the lead mini 



tle- 



:i- in the tnui- ol' ( Ii 

 Island, in tin' l.akt- ol'Kil- Copper. 

 larney ; at Mucross ; at Cronebane and I'allynmrt 



:tS Of 



the c <inl, and 



. 



is wroiii'lit in Irelanil. I.ri<! :- linmil i I^ad. 



thy, i. ' 'iidallogh in \\icklow, 



in the vicinity of Dublin ; mid n the county of Done- 

 gal: but i one or two of the-e mine- are 



'it. Iron ore i- \c \ pli'ii'it'ul in var Iron, 



.uul ; and ill the middle of the socntcenUi cen- 



