^0 Elements of Miner akgy. 



ftone is fomething magnetic, it is plain that 

 the ftiiftus muft contain at leaft i o parts iron ; 

 and alfo, that this iron is not much dephlo- 

 gifticated. Hence alfo, the colour is green, 

 which colour, or blue, is always, when it 

 proceeds from iron, a fign that the iron is not 

 much dephlogifticated ; on the contrary, a 

 red or yellow colour from iron, denotes it to 

 be in a dephlogifticated ftate. 



2 Red Cam fan. 



A red marble, not magnetic ; 100 parts of 

 it contain 82 of mild calcareous Earth, n of 

 argillaceous fhiftus, and 7 of dephlogifticated 

 iron, ii Roz. 501. 



3, Yellow figured Marble from Florence. 



Mr. Bay en found 100 parts of it to con- 

 tain 75 of mild calcareous Earth, 13 or 14 of 

 fhiftus, and 4 or 5 of dephlogifticated iron. 



4. Grlotte. 



A red marble from Autun-, contains 67 

 of mild calcareous Earth, 26 of reddifh fhiftus, 

 2 of iron, and i of magnefia, per cent, ac- 

 cording to Mr. Bayen. 



c. Amandola. 



