( 194 ) 



that of bronze, on being expofed to the 

 flightefl heat. All thofe that have been 

 burned have acquired this colour ; which 

 proves, as he very judicioufly ohferves, that 

 the green bafaltes have never fuffered the 

 adion of fire *. 



The Egyptian ftones, therefore, to which 

 the ancients gave the appellation of bafaltes, 

 have been produced by Nature in the humid 

 way. Thefe obfervations perfectly agree 

 with thofe of Bergmann on the trapps 

 produced in the fame way ; and which 

 have, both externally and internally, the 

 fame charaderiftics with the bafaltes t. 



Werner, taking the term bafaltes in a 

 %vider fenfe, and underftanding by it all 

 thofe columnar ftones which, by their prif- 

 matic configuration, refemble the Egyptian 

 bafaltes, fuppofes both to have the fame 

 origin, and adduces, as a proof of that ori- 

 gin, the bafaltes of the hill of Scheibenberg, 



* Rozier, torn, xxxvli. an. 1790. 

 t De Produclls Vulcanicis. 



which 



