﻿4 2 



T H 



NA T U 



A 



H 



TORY 



inflamable 



The Pyrite is a mineral fubftance of a moderately fixt nature : it is 

 fome degree, but not fufible , of an irregular form, foliaceous texture, and fparkling 

 appearance. It is found in large irregular mafles, and naturally forms whole flrata. 



MARCHASITES 



Marchafite. 



Tetraed* 



vel oftaed* 



HexaedricuSy vel dodecaed, 

 Hemijphericus, vel globofi 





The Marchafite is a mineral fubftance 



f 



with 



an 



ad 



of fulph 





particl 



fixt, terrene, and metal 



it is inflamable in. fome deg 



but not fufible; and generally found mooting into regular forms, putting on the ap 

 pearance of opake cryftals. 





11°. Such as have a large admixture of the phlogiflic connected in a more pure 

 metalic bafe $ and are inflamable in fome degree as well as fufible, but not malleable. 



i 



o 



COBALTUM 



Cobalt , and its pre- 

 parations common- 

 ly called arfenic. 



Cryjlalli-forme, w ^ : ■ 



Schijii lenticularis atri. 



Rude fubgrifeum, granulh Jubccerulejjentibus mi cans 



Unde 

 . Arfenicum nudum album ; 2 

 Nudum rufefc 



o 



Nudumjlavum 



The red, white, and yellow arfenic 





This metalic fubftance is generally hard, and of a blackifh-gray colour; it is fu- 

 fible, and naturally volatile when pufhed by a ftrong fire : its glafs is blue, its fo- 

 lution in aquajortis, redifh ; and its regulus of a tefTulated appearance, and dark co- 



r : it is the true ore of our arfenic's, which owe their different colours to the dif- 



lou 



ferent methods of preparing them. 



2 . STIBIUM 



Antimony* 



Fibris capillaribus fparjis. 

 Striatum, 



Cry fl alii zatum, 



Rubrum, 



L. S. N, 



, Fibris Spatum inter cujfiantibus. . 



Antimony is generally hard, and very heavy in its natural ftate : it is diftinguifhed 

 by the filiated texture, and the filver colour of its regulus, which frequently holds 

 in the ore : it fhews a good deal of volatility when pufhed by a ftrong fire, and its 

 more fixt parts turn into a purple glafs. Its folution in aqua regia is yellow, and the 

 mafs, when pufhed by fire, grows red before it melts. 



3°.BISMUTUM 



Bifmut. 



Bifmut is known 



Nudum, 

 Albo-jlavefcenti micans. 



L, 



N, 



reg 



u 



lus. 



whitifh pale 



and the tefTulated appearance of 



Its glafs is brown ; its folution in aqua fortis red ; and the mafs commonly 



kindles before it melts in the fire 



r 



4 







ZINCUM 



Zinck, 



Canum galina intertextum 



-w 





J 2 . Micaceum fubt ejfulatum nigrum, 

 3. Micaceum rubicundum inquinans 

 L4. lerreftre. 



L. S. N 



This mineral fubftance is well known by the bluifh-white colour of its metal 

 moderately hard, and malleable in a fmaU degree, but apt to crack : its folutio 



it 



a 



qu 



I 







t 







\ 



