44 



ILLUSTRATIONS OF THE 



Now, rocks having their layers exactly paraL 



lei, are very 

 horizontality to hav 



and 

 bee 



we 



iild venture to conchide fi 



prove their original 

 more precife than 



nalogy 



alone. In beds of fand-flone, for inftance 



thing 



is more frequent than to fee the thin 

 layers of fand, feparated from one another by 



lay 



ftill finer of coaly, or micaceous 



that are almofl 



dly parallel, and conti- 



nue fo to a great extent 



devi 



Thefe pi 



their parallelifm only in 



without any fenlible 

 can have acquired 



fe 



f the 



jufl ilated, by wh 



the furfaces of 



ay 



hich it (I 



parallel to its own furface, and 



prop( 



ders 



pofitc 



parallel to one another. 



therefore, may not now be horizontal, they rauft 



have been fo originally ; otherwife it is impoin- 



Though fuch ft 



b ,. 



or any 

 ced. 



fcover any 



for their Darallelifm 



by which it can have been prod 



39. This argument for the original ho 

 ity of the ftrata, is applicable to thofe th 

 w flirtheft removed from that pofition 



A 



mong fuch 



f( 



r 



ft 



that 



d 



highly 



or even quite vertical, and amono; thofe 



that are bent and ir 

 taftical manner, as h 



b 



apnens 



d in the moft fan- 

 more efpecially in 



the 



