tar is a station on the Bosnia State Railway, and has 11,000 inhabitants, who are of many nationalities, Herze govina having passed from Turkish rule to Austrian military occupation in 1878. Mostar is situated on the Narenta, a brawling stream, thirty-five miles from its mouth. 'I'he banks are high and rocky. and are connected by a beautiful bridge, for which Mostar has always been celebrated and which forms the subjflct of our illustration. It is a single arch, the span heing 95304 feet, and

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... low water the parapet is 76 feet, above the water and at high water it is sometimes only 44;y4' feet from the water's surface. The breadth of the arch is 14'2 feet, the road way 13'2 feet, On the north side is a stone conduit for conveying water to the ea�tern portion of the city. The bridge rises about ten feet in the cen· ter, giving an effect of lightness which was evidently not intended in the original designs. The building of the bridge is attributed to Trajan or Hadrian, about A. D. 120, but the Turks have carefully concealed the Roman masonry with small stones, which give the bridge the appearance of a Turkish construction. Both the inherent grandeur of the arch and tradition favor the belief that it was constructed by the Romans. J tieufifit jmericlu. ing water to it. A damp cloth placed over the design or model keeps it moist when not worked. In model· ing bass-reliefs the operator applies the clay to a slab of slate or a metal-covered block, which can be raised and lowered at will. Some models are made of soft wood shaped out by the usual chisels. gouges, etc. The clay model when completed is allowed to become hard. A coating of shellac is then applied and the sides built up with a quantity of soft clay. A solution composed of melted beeswax and resin is then poured over the mould, the casting of which forms the wax mould from which the. plaster of Paris cast is made. About 5 pounds of beeswax to about 7 pounds of resin are required to form a 12 pound mould, it taking about half an hour to harden. The moulds when cast are about 2 inches in height and ranging from � inch to 1 inch in thickness. The wax mould when a plaster cast is to 0, , 357 tion is the taking of the cast from the mould. This is performed by submerging the mould into a water box for a few moments, the cast corning in contact with the water causing the plaster to shrink and raise slightly. The mould is taken out as soon as the cast raises, and turned bottom up. The sides and bottom of the mould, which is elastic, are then pressed in and out by the fingers, the operation causing the cast to loosen and drop out. Before the cast is dr�' the baek is �cored with a knife. which causes it to hold when plastered to the ceiling. The cast is then tritmLlt'li and the center hole cut througtl with a gouge. Luke warm water in winter and cold water in summer is re quired for loosening the castR from the moulds, the wax being very sensitive to heat and cold. The cost of the wax used in making' the moulds ranges in price from 30 cents to 38 cents per pound. and the resin from 3 cents to 4 cents per pound. A single operator can make a cast about 2 feet in diameter in about one hour.