MINERALOGY. 24/ 



SECT. CCLXV. 



E. The *teljften of the Swedes, Lapis olia- 

 ris. Sax urn compofitum fteatite et mica. 



a. Light grey, from Fahlun, and alfo 

 Byxberget at Norberke. 



b. Vvnitilh yellow, from Sikfioberget in 

 Norberke. 



c. Dark grey, from Riddarfhyttan. 



d. Dark green, from Saivifto in the parifh. 

 of Tamela in Finland. 



This is employed with great advan- 

 tage to build fire-places and furnaces, 

 c:c. and when it is flaty, the extremi- 

 ties of the ilrata muft be turned towards 

 the fire. 



SECT. CCLXYL 



F. Porphyry, Porphyrites. Jtalorum Porfdo. 

 Saxum compefaum jafpide et feltfpato^ inter- 

 dura micd et bafalte. 



a. Its colour is green, with light green 

 feltfpat, Serpentina verde antico. It is 

 laid to have been brought from Egypt 

 to Rome, from which latter place the 

 fpecimens of it now come. 

 I. Deep red, with white feltfpat, from 

 Italy, and Fgern in Norway. 



c. Black, with white and red feltfpat, from 

 Kiitten, in the parifh of Elfdalen in Da- 

 lame. 



d. Reclaim brown, with li^ht-red and 

 white feltfpat, from Hyk'eberget in Elf- 

 dalen, and Guftavftrom, in the parifh of 

 Goiborn in the province of Wermeland. 



R 4 e. Dark 



