The manufactures of this class include aerated waters, beer,.
Produced in non-aerated water it is probably an oxide.
For aerated water bottles several successful devices have been introduced.
Agriculture is the staple, but there are chemical, aerated waters, bricks, terra-cotta and other manufactures.
As a river-port and the terminus of railways from Varna and from Sofia via Trnovo, it has much commercial importance; and it possesses tobacco and cigarette factories, soap-works, breweries, aerated water factories, dyeworks, tanneries, sawmills, brick and tile works and a celebrated pottery.