Ir- • , [o= ror that Bradford Porter.) _ Essl ys Geotogyi—No.. iatij the placid sunshine, glow hearti• of tire and crel,...tys of);now I,l,ched ti sides with deep 'ravines in. ;,,undcrs Eilenced, and their lighuiings d oeaCh'd ; c;itar€l.or heat of spent eruptions breathe, l';;;J;e co la)? earthqbakes .shake them from bene.tb.". , • Olt the formation of the - POlcanit roc k g —This class of. rocks has been to .„ ; cd during every period of our globe fr ,,: a the plutonic, to the present day: T he y are principally composed of the jo „ : ,Jescent liqattl ) of our earth, which ha+been ejected trom the interior of it. 3:,L1 c ooled on its surface or in fissures. Vile:awes have been a subject of much jaierest in all ages of the world.. The 'wil d have - looked. on them with as fi±siennent, and the unlearned with su- pc,f4iinnus awe. V,,butts have been the theories to at-, count fo s. The Egyptians at iro,:teJ all physical evil to Typhon ;I a •ti Os Greeks who adopted die science' a.,.,l.iap,er,ftition.4 of the 'Egyptians, tell Willa Typhon was a giant niore.pow elltii than ill the children of the earth ;. las a:asi reviled the s.tars, and his arms and setting sun e .a:i•ace.l the rising waif - his hands he 'uled rocks to. the, /igh'eathetivels ; (Irv - gleamed from his eves: and liquid fire from his mouth.", North after his birth he so frightened the goos, that-Jupiter as a punishment. hun in Mount Etna. where hp continues i , t rave; shaking t h e earth with his groans, and ejecting ii qt,nl iire frunihis mouth." Telt,iwaus supposed volcanoes to. b o , k4 seil h. thea....tionofinternal winds, cr-iteratiar a brat sufficient to inflame cOrtibus:i ' ile bodies in the bowels olthe Hulatrous nations of America 21;,1 the Pacific' islands always d - eitia;tl uuktiovin-cause of earthquakes and modern t ,, n ton ol eoa; and other entinbusti ,;