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Johann Kunckel.
(From the Collection of Etchings in the Royal Gallery at Berlin.)
per ounce, and lords and peasants came after it eagerly. Rain-water would have been just as good, Kunckel, who tells the story, remarks. But one day Bauduin broke one of the vessels in which was contained some of the calcined nitrate of lime, and he observed that this, like the Bologna stone, was luminous in the dark after exposure to sunlight. Bauduin appreciated the importance of his discovery, and, taking some of his earth to Dresden, talked about it there. Kunckel, who was then the Elector's pharmacist, and keenly interested in new discoveries, heard about this curious substance, and
