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be placed on charcoal, and the flame of a candle be 

 diredled upon it with a blow-pipe, by which it may 

 foon be reduced to its metallick ftate. 



5thly. If to any medicine, perfume, or cofmetick 

 in form of powder, liquid, or ointment, a few drops 

 of this liquor be added, a brown colour will foon 

 appear, if any impregnation of lead be prefent in 

 the compofition. 



" 6thly. The vitriolick acid and faccharine acid may 

 alfo be employed to precipitate lead from liquors, 

 but the above teft appears to me preferable to any 

 thing of the kind yet difcovered, 



Prefervative Method, 



Smelters, plumbers, painters, and manufafturers 

 of red and white lead, in carrying on their dangerous 

 operations, often perceive a fweetilh tafte, attended 

 with a flight naufea, or fenfe of faintnefs, evidently 

 proceeding from the fugar of lead. But this ap- 

 proach to difeafe is too commonly negledled till 

 health is completely ruined. Such perfons fliould, 

 previous to their going to work early in the morn- 

 ing, infl:ead of drinking a pernicious dram, take 

 a fpoonful of cafl:or oil, or oil ot olives, and ufe 

 fat oleaginous foods. For their further prote<5lion 



they 



