90 
EXPOSITION AT VIENNA. 
In the Russian section, Alexander Froloff exhibited a pic- 
ture of St. Catherine, and Jean Bouroukhine one of St. Ana 
stasius, and of Jesus Messing little children. All of these 
mosaio pictnres are from the original, by Professor Neff, and 
are intended for the Isaac Cathedral. The same artists, and 
others of the Imperial Mosaic Works at St. Petersburg, cou- 
tributed largely to the Paris Exposition in 1867. The tes- 
serse are more vitreous than ordinary tile material, and are 
made at the Imperial Glass Works. The mosaic establish- 
ment was started in Rome in 1846, and was transferred to 
St. Petersburg in 1856, and connected with the Academy of 
Fine Arts. 
Minton, Hollins & Company, exhibited three or more 
mosaic pieces, Nos. 85, 86, and 87, suitable for church or 
domestic pavements. They were in the form of slabs, with 
encaustic (inlaid) centre-pieces. 
A considerable quantity of smaller mosaic tiles (tessene) 
were shown, but no Information concerning them could be 
obtained. The form was triangulär, about an iuch on a side, 
and the colors chieüy blue and yellow. There were also large 
blue and white tiles, some with raised Moresque designs. 
The art, as we have seen, was carried into Britain by the 
Romans, and appears to have been the forerunner of the tile 
pavements. It is not surprising, therefore, that the most 
perfect tessene are now made in Great Britain, and of the 
same materials used for the encaustic tiles. The colors and 
the methods of mauufacture are the same, the difference being 
in the size. The sizes, as made by Messrs. Minton, Hollins 
& Co., vary from little cubes, one-sixteenth and one-eighth of 
an iuch square to one-half of an inch square, and even larger 
for some purposes. They are made square, triangulär, and 
of various shapes, and in all shades of color. 
The difficulty and the cost of setting these tessene depend 
upon their size and the nature of the design. A given design 
being furnished, and the size of the mosaic when finished, the 
Messrs. Minton, Hollins & Co., form it in slabs, each meas- 
uring about one yard square and two and one-half inches in 
thickness, convenient to handle and transport and to place in 
the intended position. This is the method usually followed