MINERALOGY. 151 



c. It foftens in a common degree of heat, fo 

 as to itick to the teeth like pitch. 



d. It is of a black or grey colour, and of a 

 dull and fine-grained texture. The grey- 

 is reckoned the belt, and is fold very dear. 



This drug is brought to Europe from 

 the Indies •, it is employed in medicine, 

 and as a perfume. 



SECT. CXLVL 



1. Amber, dmbra fic.va\ Siiccinum, Ekftrum. 



This is a iubftance which is dug out of the 

 earth, and found on the fea-coafts. Accord- 

 ing to the experiments of Mr. Bourdeliri, it 

 confirms of an inflammable fubflance, united 

 with the aci 1 of common fait, which feems 

 to have given it its hardnefs. It is fuppofed 

 to be of vegetable origin, fince it is faid to 

 be found together with wood in the earth. 

 B) diiliilation it yields water, oil, and a vola- 

 tile fait, which the abovementioned author 

 has found to be the acid of common fait, 

 united with a little of the phlogifcon. There 

 are often found fifli, infects, and vegetables 

 included in it, which teftify its once having 

 been liquid. It is more tranfparent than molt 

 part or the other bitumens, and is doubtlefs 

 that fubftance which firfl: gave rife to electri- 

 cal experiments. 



Its varieties are reckoned from the colour 

 and tranfparency : it is found 

 A. Opake, Succinum opacum, 



a. Brown. 



b. White. 



c. Biackiih. 



L 4 B. Tranf- 



