140 geological CMAKGES of the EAKTII- 
portion to those which are perpetually forro'^^y 
LAV/AA W _ ^ 
Silent but persevering efforts of the sea worn* 
coral is produced. Banks of coral are found ^ i 
and at all distances from the shorej entirely uncon ^ j 
the land, and 
progression 
detached from each other. 
progression, they grow up towards the Lf, t ji 
winds, heaping up the coral from deeper «’ai^|^^,jv 
accelerate the formation of these banks lOt® 
islands. They become gradually shallower j qii' i 
once the sea meets with resistance, the coral 
once uie sea mccta walu a«..-»i3uiws-a-, 
thrown up by the force of the waves breaking ^ 
bank. These coral banks have been seen 
stages — some in deep water — others with a ,y ” ' 
■ ■ formed • 
an 
pearing above the surface, just 
without the least appearance of vegetation ; 
others covered with soil and weeds. . 'iioWS '’’f 
The loose corals, rolled inward by the 
pieces, ground, and, the reflux being unable itb* 
away, become a bar to the coagulated 
they are always intermixed. This sand, ^ jyte*! ii' 
raised, is lodged at top ; and when its accuoi 
is elevated by violent storms, and no long®5 - 
reach of common waves. 
it becomes a resting 
. 
birds whom the search ot prey draws thither 
feathers, &c. augment the soil, and prepat® 
leauiers, <xe. .lugmcuL ou.,, o..... j..-, 
reception of accidental roots, branches, and se j i> ,,, 
U.., *U,.K t\f Kr/inorlif’ tliifllAr }%V l^irtls. . .n»t^ >it' 
by the waves, or brought thitlier by birds. jytef*' y 
are formed : the leaves and rotten brancbes> ' j,) j/| 
. . . . . .. »• t . 1 1 . ^ 1 . I’jn 
with die sand, produce in time a light black yp. 
trees and shrubs vegetate and thrive.^ _ 
continue long in the sea without losing y 
oil*’ 
powers, having been thrown on such ^ 
trees which are particularly adapted to all s® 
sandy, rich, or rocky. yy^,. 
The violence of the waves, within the ^ tb 
/ 
generally be directed to two points, accordinS tjSi’liVi 
soons. Hence the islands formed from ®°'^i!^„al 
0'' 
when large, the sea, meeting most resistance 
soons, nence me isianas lorraea rroui 
be lonff and narrow, and lie nearly in a nieridi^ ii^ 
^ ^ 1 . 1 - j .,<5 they . 
ue long iKUiuvv, cuiu lie iicaii^ iii a aajw*- 
Even supposing the banks to be round, as 
til® 
W UCII Jaig., j — ........ . . .>■. 
must heave up the matter in greater quanm* v 
towards the extremities : and, by the saiii® 
