59 



,-md granite be the oabtfaoi result of the internal conrjclalton of that fluid . ho solid irtat 

 cottid ever h#vn been funnecL Bat arts mru rig Hie exigence* of the cru*l apart from all 

 theories of its origin t and limi I injj our view to the ft rent lakca or octant of faxed roek 

 bctiealh particular partial of U*q cru^t or occupying ureal cavities iti i solid globe r which 

 tire all that Mr. Ltjili will rece^nuc as necessary to ciptaati plulajn'n and volcanic plicuo- 

 ranni > it h obvious llidl , until llic tempera La re of the whole kite or ocean were reduced 

 to that of incipient congelation f the upper Saver would retain it* heated fluid cofidLion- 

 If |Oj the ijjrooiift fluid would have lime to penetrate nature* to great dujtanec* in the same 

 wfl V afl rb*t of trap. But [granite felos arc ijciie rally found to be short and sinuous, a 

 ci rcuma tanoc which ran!radisiiijfjiii*-lin lb cm from dykes of trap, ;md which seem* only eipu- 

 cabte an iko assumption that Lilt inject ivv tendency of the fluid was counteracted fey iti 

 tendency to congeal at tha surface frutn eon tact wit li the roc bi atmre nud in remain I lit*? in 1 hat 

 j?ta!o in CjthuaeqLieucc of its eiaandina; or bccomia^l^ dense when it assumes I he del id form (I). 

 The phenomena which have been discuuod in ilm pa pur disclose two structural in hypognna 

 rocks, tJie Jaininar, and the (jlohufar pacing info the cubokUJ. Now the Brat may be due, in 

 I he case of £ucitt» aim ply to rwiw ciE" iw:i or to l.hU eei uomhirk.ilmn with other cau^ wliirli 

 liavc been adverted to. The second ii clearly the. original mode of eryslalUialion^ if the 

 above views are sorrecl , or if it bo (p-aulid , wiMiuuI reference fa llicm , (hit I njriulLte *oli- 

 difira from the surface downward*. In I ha uppnr layer of the (jraoito fluid , nuclei are 

 formed, which gradusJJy enhrpe till their mutual cipjuiEioo prrvenls further increase^ and 

 the layer , bearing- the form of \U mould (&} f u complete. This layer ii the upper tied or 

 stratum of the granite, and oLhers are suoccMiTciy formed heneadi , each } of eourso^ con- 

 form ing to that above it, The spheres not only wben fmt formed, nut dunn^ tin* tottR 



(I) Tbi criniiu win* frt Ctrmmalt and &ut&n teera la d#in*bitritfl llnl * *rail "iflit hm bfl«& formtl *n(l* 

 lb« gribiL* bfraftiLk rataJiwd iU fluidity, fmt El ntL *nJj wmui viiim int^ Lb* ■lite* bcl ii itulF Ir^TflrirJ by 

 vriti »t Uif i«uv hiqi *f gnnll^ Theiff «■ *Uu iflartirtfei ccaikniJ in Itn iliti *Wti, (P> M flfcj:Jiii"i Ji^^f 

 p, 171 . 1). 



F.-.0UI it* poinl « F fu*i*n cf p-sml* J>riii B vtrjr biflb <i«mpflrcd rfilii r*l«nic rtcJii - I ^reiarij^ j« ai^b ** 



Ltal flf*ny i*dEHiBt>rr ruki, it Mowi io J^Bj a* H« l-siiipe-rituj-t of flails ti bbav« tint p«iut - U will 

 tiaalliiDa reJadn^ Ibi incttRitunl toclii it llio pUbi. ef cental Enl* U* »wn lAbitkitn P tad will only e*M< I* *9 

 » wb«ti IE it OH lb* pain I af iflaiLn^ la bfl a UuHi prrtiW*' . lb« ifc-p* *t l*W T*LM. T**T RNffl flttld 



wua emntff vrbru iU i*rap<riLujra win r«lu«id t* tbal *f InflipintS a|»f*3al^ii &Q'l »^^n lh.» Jl.iiJ had. dafu.*- 

 qq^Hl^ t bHomi taiek, Tie/ ftbrvr ^ it wwi, *U I ail fJTd/li in ill fluid, ititf le diqJE into tba rctL tb«r« JK 

 Et^ji iahnra it* |r*«H# a t«fl^ifmtBfi 178Q B ffikrpd a tlraijrht OKbininaJ fiiiBi-e *r wmJi ifl injr 



roct , it tvsoli imintdiJlfly twjin to m^U tUn licLei. TJi# tblbp ip 1 * Ibwefori raorc fjrdpjieiM llitn ««b»n»C*3. 

 TViripMO JlulJ. il lha *iaW bin-d P mijjTil htmilii in « fluid alita Jsod; iftff iU baat wi. inBDiq.uat« l* mb]t Iba 

 adjaHiit recki. H miftU I Wafer* b# fdn-ud inla finitfi Vtlbaii iHerlns lb«ir pradaiii fww- Trappfao raiaj 

 alS|bL Ibui "iff -cnniiJaf^d a« grarrailj an itbflu LC III h — gr«|i|p ( hi (f^r rally Jj-roeh-B mi C*S, ffl^ iti irrtfliJar dixl r ibMlL*Q 

 cT akuaieai Mij;rr diunli ia a j&ct *oqJ| a^cl Lba *fl«rt* *f graaiu* rdoi U ft Fram Lba grrit nliffcrebca in tin 

 /uiinp pflint ef graiiitd and tup , it jir*b*Uy ah* raialla tbal iba h^t ia n*T*r f*uiid *i an *T*p1jimaj r««b, 

 watrfu LHa later frem iti KttatioB ef rioidilj Uw*r in lba taerooaaiatf ic ic*Je , iJ<djM *f fa«iag impelled 



Ibl'OV^b linurM. and ■jnyml t>Tfr [lie nirf*cF. 

 (2j &bb b«t* ib appeuiii- 



