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The oracles of the Lord are pure oracles; as silver tried in the fire, proved [in] a furnace of earth, purified seven times. 8 σύ, Κύριε, φυλάξαις ἡμᾶς καὶ διατηρήσαις ἡμᾶς ἀπὸ τῆς γενεᾶς ταύτης καὶ εἰς τὸν αἰῶνα.
In Protestant theology, verbal plenary preservation (VPP) is a doctrine concerning the nature of the Bible.While verbal plenary inspiration (VPI) applies only to the original autographs of the Bible manuscript, VPP views that, "the whole of scripture with all its words even to the jot and tittle is perfectly preserved by God in the apographs [1] [2] without any loss of the original words ...
16th century cupellation furnaces (per Agricola). Cupellation is a refining process in metallurgy in which ores or alloyed metals are treated under very high temperatures and subjected to controlled operations to separate noble metals, like gold and silver, from base metals, like lead, copper, zinc, arsenic, antimony, or bismuth, present in the ore.
Small round water jacket furnace for silver-lead ore, 1897. A water jacket furnace can be used to reduce non-ferrous oxide ores mixed with coke, to produce metal and slag. When smelting lead, the feedstock is lead oxide, coke and fluxes. When smelting lead sulphide ores, the ore is first sintered to form a lead oxide sinter. Lead and silver ...
Gold and silver occur frequently in their native form Mercury compounds are reduced to elemental mercury simply by low-temperature heating (500 °C). Tin and iron occur as oxides and can be reduced with carbon monoxide (produced by, for example, burning charcoal ) at 900 °C.
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In the morning, however, take out the gold and melt it again, hammer it, and put it into the furnace as before. After another day and night take it out again, mix a little red copper with it, melt as before, and put it back into the furnace. And when you have taken it out a third time, wash it and carefully dry it.
Atkinson says he refined and tried the silver at Hilderston and at the Tower of London. He noted that similar looking rocks varied in silver content. By the time the Germans arrived, who he called "Brunswickers", in 1609, some ore was disappointing. He hoped to find the rich silver seam in a new mine nearby in the future. [92]