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 notwithstanding his resistance and appeals to the Austrian authorities for help, they carried him by force to Dresden. From this time he was more strictly watched than ever, and he was shortly after transferred to the strong fortress of Köningstein. It was communicated to him that the royal exchequer was completely empty, and that ten regiments of Poles in arrears of pay were waiting for his gold. The King himself visited him, and told him in a severe tone that if he did not at once proceed to make gold, he would be hung! ("Thu mir zurecht, Böttgher, sonst lass ich dich hangen.")

Years passed, and still Böttgher made no gold; but he was not hung. It was reserved for him to make a far more important discovery than the conversion of copper into gold, namely, the conversion of clay into porcelain. Some rare specimens of this ware had been brought by the Portuguese from China, which were sold for more than their weight in gold. Böttgher was first induced to turn his attention to the subject by Walter von Tschirnhaus, a maker of optical instruments, also an alchemist. Tschirnhaus was a man of education and distinction, and was held in much esteem by Prince Fürstenburg as well as by the Elector. He very sensibly said to Böttgher, still in fear of the gallows—"If you can't make gold, try and do something else; make porcelain."

The alchemist acted on the hint, and began his experiments, working night and day. He prosecuted his investigations for a long time with great assiduity, but without success. At length some red clay, brought to him for the purpose of making his crucibles, set him on the right track. He found that this clay, when submitted to a high temperature,