first to practise it.[1] The early German mirrors were small, but they had broad frames, and were richly gilt and adorned with carved or moulded work in high relief. Ottley thinks that the press was used for pressing mouldings for the frames of mirrors, and that the lead was used for the metallic face.
The third art is imperfectly described. If Dünne's testimony had been lost, it would not appear that this art was printing, for there is no mention of books, paper, ink, types, or wood-cuts. The lead, the press, and the goldsmith's work on things relating to printing, could be regarded as materials required in the art of mirror-making. But "the thing," and "the nice things," which provoked exclamations of surprise at their great cost, could not have been looking-glasses.
Dünne said, very plainly, that this art was printing; but Dünne's testimony could be set aside, and Gutenberg's connection with typography at the period of this trial could be inferred from other evidence. The thoroughness of the workmanship in the books printed by Gutenberg after 1450 is a thoroughness which could have been acquired only by practice. Before he began this practice he must have devoted much time to experiment and to the making of the tools he needed. No inventor, no printer can believe that the skill
- ↑ Glass mirrors, almost unknown in the fourteenth century, were regarded as novelties in the fifteenth. It seems that they were first made in Germany. Winaricky lays great stress on the fact that the Bohemians were the earliest and the most skillful workers in glass, and that they also excelled as lapidaries and metallurgists. He says, but without proof, that the art of polishing stones and making mirrors was acquired by Gutenberg in Bohemia. The learned Beckmann says that
"Early German mirrors were made by pouring melted lead or tin over a glass plate while yet hot as it came from the furnace. In and around Nuremberg, convex mirrors were made by blowing with the pipe in the glass bubble while it was still hot a metallic mixture with a little salts of tartar When the bubble had been covered and cooled, it was cut in small round mirrors. These small convex mirrors were called ochsen-augen, or ox-eyes. They were set in a round board, and had a very broad border or margin. One of them in my possession is two and a half inches in diameter. … This art is an old German invention, for it is described by Porta and Ganzoni, who both lived in the beginning of the sixteenth century, and who both expressly say that the art was then common in Germany. Curious foreigners often attempted to learn it, and imagined that Germans kept it a secret."
