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JASPIS.
151
the bladder. His patron, the Kaiser, so highly admired the whimsical variety of shades and colours wherewith Nature has painted the different species, that he caused a table to be made up out of them, so ingeniously arranged that their contrast produced a landscape, with its moun­tains, rivers, trees, and clouds. The work took several years to complete, and cost " many thousand gulden." In this piece of " lavoro di commesso " we discover the first germ of the afterwards so celebrated Florentine manu­facture, the " Pietra dura " mosaic, that constructs true pictures of bouquets, &c, imitating the flowers with the natural colours of slices of Agates and Jaspers cut to the shape required : an art involving incredible labour, and corresponding costliness in its finished productions.