Checking the quality of Saltpetre (Nitre; Potassium Nitrate; or KN03). Saltpetre is the principal ingredient in gunpowder; and is still used in the preservation of some foods. In medicine it was used internally as a diuretic; but now is only used externally for a number of conditions; such as asthma. From 1683 English edition of Beschreibung allerfurnemisten mineralischen Ertzt; Lazarus Ercker; (Prague; 1574). Copperplate engraving.
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TOP29133622
Source:
達志影像
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RM
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16thcentury16centuryXVIcenturyXVIthcenturysixteenthcenturyc16th1616thxvixvithcenturysecXVI1616thxvixvithsixteenthcenturyc16hengravingengravermedicinemedicalmetalmetallicmetallurgyMetallurgicalcheckingpotassiumscienceconditionsexplosivediureticstilleditionsaltpetrepreservationprincipalsuchpraguenowchemistrynitratekn03qualitylazarususedgunpowderexternallyingredientcopperplateinternallyasthmamineralischenengravingnumberenglishfoodsnitreertzterckerallerfurnemisten16831574beschreibung
1616161574168316th16th16thMetallurgicalXVIXVIXVIthallerfurnemistenasthmabeschreibungc16hc16thcenturycenturycenturycenturycenturycenturycenturycheckingchemistryconditionscopperplatediureticeditionenglishengraverengravingengravingerckerertztexplosiveexternallyfoodsgunpowderingredientinternallykn03lazarusmedicalmedicinemetalmetallicmetallurgymineralischennitratenitrenownumberpotassiumpraguepreservationprincipalqualitysaltpetresciencesecsixteenthsixteenthstillsuchusedxvixvixvithxvith