﻿o 



A 



M 



A 



A. 



57 





I 



I 



T. 



IV. 



Of 



metaltc Subjlances 



- 





Stibium 



Striatum nitem. 

 Striated antimony. 







We frequently meet with fome of this metalic fubftance in, and about the lead 

 mines of Liguanee ; but it is not made any ufe of here,- though well known to be 

 not only an eafy alterant, and fudorific, in the fimple flate ; but a fource from whence 

 we are now fupplied with many very active and valuable medicines : the prin- 

 cipal preparations made of this mineral are the calx antimonii diaphoretica - y calx 

 antimonii fale ant malt divifa & attenuata y vulgo, James's powder ; crocus meta- 

 lorum , kermes mi?ieralis ;fulphur auratum ; vitrum antimonii-, tartar e met i cum ; gut tee 

 emeticce ; and the various reguluis. But befides its ufes in medicine, it is frequently 

 employed in refining fome of the more perfect metals. 



l 



c 



PLUMBUM 





Ar gentium granulato-mi 

 The fuberanulated lead 





■ 



Tin 

 particles appear very fmall when the mafs is broke in a crofs direct 



y rich, of a mining filver gray colour, and lamellated 



but 



It 



richly impregnated withfilver, which renders the folution of it in aqua fortis milky ; 

 but is not found in any regular bodied veins, which obliged the Gentlemen who had 

 been engaged in the lead works of Liguanee (where this ore is had in the greateft 

 abundance) to drop the undertaking, after they had been at a great expence in build 



very compleat and 



fet of works ; and carried on the manufacture for 



fometime 



The ore flands a confiderable time in aqua fortis before the fermentation rifes to 

 any height, but it gradually throws up a confiderable quantity of fulphur, which, in 

 colour and general properties, feem to anfwer the characters of the common fort ; and 

 I doubt, if fome of the fulphureous fprings found in that Ifland do hot derive their 

 qualities from this fource, efpecially as no iron ores have been yet obferved there. 



The mechanical ufes of this metal, are too well known to need any mention here ; 



many to require our attention long 



generally 



and its medicinal qualities 



pernicious to the nerves ; 



mal effects, which feem to affect the bowels more immediately ; but th 



monly followed by a paralitic weaknefs of the limbs, and a general refolution of the 



and fuch as work at it in any ftate, feldom efcape its dif- 



corn- 



whole nervous fyftem, if neglected 



It 



not immediate in its action, and feldom 



affecls for fome months after the firft application , but is fure to commu 



lurking poifon in fome degree with continuance : 



lx, and precipitat 



the 

 ifed 



in plaifters, and frequently ferviceable to ftupify the nerves, and lull the fharp 

 wichy pains fo peculiar to fcalds and 



falts 



fine 



aftringent, and frequently ufed in inflammations and defluxions of the eyes ; but all 



inward application is both dangerous and imprude 



flive Jlimulus 

 the adminiftrat 



can any thing befid 



an 



and the threatening ruin of a family, from fuch a fource 



The other remarkable appearances of the lead ores of Jamaica are thefe following 



PLUMBUM 



Argenteum lamcllulatum. 

 The lamellated mining lead 



~** 







• 



R 



This 



/ 



