06 



ILLUSTRATIONS OF THE 



fubflances, they 



aed 



together by th 



fame principle, or explained by the fam 



It remains to confider that part of the hiftory^of 



both which defcribes their changes after their 



the furface 



and 



fliall find 



new 



fes introduced, which are more diredlj 



the fubjeds of obferv 



than thofe hithert 



eated of; caufes, alfo, which ad on all fofl- 



dellina 



d alike prepare them for their 



X 



V, 



S E C 



