From the frequent mention of vessels of glass and earthenware, the reader will naturally expect a notice of the arts to which they were due. In Greece and Etruria the fictile art was early developed, and there existed a guild of potters in Rome so early as the time of Numa. The instruments used in the manufacture of pottery--the horizontal revolving table, and the sticks used to vary the shape of the clay during its rotation, together with moulds and graving tools, are among the most ancient inventions. The pottery formed by the Greeks and Romans was of the soft variety, that is, the baked clay of which the vessels are composed may be easily scratched with the knife. The earth was commonly red in color, as we see in the ground of so many Etrurian vases. But other specimens are white, and an artificial black was frequently produced. Varnishes of asphalte, pitch, or tar, burned into the clay, were often employed, and the inner surface of the wine-jars was roughly coated in this manner. For their bright colors the ancients used earths and the ores of various metals. The art of painting vases employed a large number of artists in Greece. Curiously enough, it seems to have died a natural death before the times of the Roman empire; and in consequence, ancient painted vases became very costly, and were much sought for by the connoisseurs. The chief colors employed were black and yellow; the designing is frequently good, but the execution cannot compare with that of the middle-age Italian and other schools of vase painting. Samos, Athens, end Etruria, were most famous for the exercise of the potter’s art, though many other places were seats of the manufacture. The kilns used for baking were circular in form--in general appearance something like a lime-kiln, but differing in the greater care with which they were built, and in their internal arrangement. They were covered with a dome-shaped roof, and the wares were baked on a circular floor, supported in the centre by a column, round which the fire was lighted. One object of emulation among the Greek potters was to make vessels of perfect form and great tenuity. Such vessels when produced were highly valued, and some Athenians seem to have attained a high pitch of excellence in the production of these thin and light vases. Greece was the chief school of design in pottery, as in most other arts; and the less inventive Romans were content to borrow, imitate, or at most, modify the forms and patterns of their neighbors.