PART II. 



EXAMINATION OF THE FACTS AND OPINIONS, 

 GIVEN BY DIFFERENT ADVOCATES 



EOR THE VOLCANIC ORIGIN OF BASALT, 



WHO FOLLOWED MR. DESMARESTj 



TO WIT, 



MR.FAUJAS DE ST. FOND, MR. DOLOMIEU, MR. WHITEHUUST, 

 BISHOP TROLL, ABBE SP-ALANZANI, AND DR. HAMILTON. 



UTINAM TAM FACIIE VERA INVENIRE FOSSEM, HDAM FALSA CONVINCERE. CICERO. 



I HAVE, in the preceding account of Mr. Desmarest's 

 Memoir, enabled the reader to form some judgment of its 

 nxerit; and to determine, how far its author has succeeded 

 in establishing his position, that basalt is a. volcanic proy 

 ducti^n. ' 



The advocates for this opinion^ no doubt, may say, that 

 its truth does not rest soLelij on Mr. Desmarest's proofs; that 

 the Volcanic Theory has many other advocates, Avho, per- 

 haps, may support it more ably than its original inventor; 

 and who may adduce new arguments and facts, which had 

 escaped him: that, therefore, to judge fairly, it becomes 

 necessary to examine, what other, writers say in its favour; 

 aji4 to try what new lights they throw upon the subject. 



1 2 It 



