Millstones and pumice were also exported, but for the former the more gritty lava of Rocca Monfina was later on preferred.

The sandstones are used for building, and for millstones and grindstones.

15 [52]), and millstones, salt (from a marsh at the east end of the harbour), and gypsum are still exported.

The slurry, which is wet enough to flow, is ground between millstones so as to complete the process of comminution begun in the wash mill.

Rockland county quarries considerable trap rock, used mostly for road-making and concrete, and Ulster county has for more than a century produced most of the domestic millstones used in the United States.

The surface soil is clay in which are embedded fragments of siliceous sandstone, used for millstones and constructional purposes; the subsoil is limestone.

The mineral products of the district also include lignite, copper, manganese, vitriol, lime, gypsum, volcanic stones (used for millstones) and slates.

Granite and other hard stones, having but a limited use (for millstones and the like), have the best chance of survival.

The large circular millstones of Roman age worked by horse-power are usually made from slices of granite columns.

Minerals produced in small quantities include gypsum, millstones, salt and sandstone, and among those found but not produced (in 1902) in commercial quantities may be mentioned allanite, alum, arsenic, bismuth, carbonite, felspar, kaolin, marble, plumbago, quartz, serpentine and tin.

The mineral products of the district also include lignite, copper, manganese, vitriol, lime, gypsum, volcanic stones (used for millstones) and slates.

The grinding of the hard rock-like masses of clinker is effected between millstones, or in modern plants in ball-mills, tube-mills and edge-runners.

Buhrstone, a cellular variety of chalcedonic quartz from the Tertiary strata of the Paris basin, is largely used for millstones.

In the Persian period the city is said to have had 40,000 inhabitants; the population now consists chiefly of Tatars and Armenians, who carry on gardening, make wine and produce silk, salt and millstones.

Sadly, what were great economic strengths, have, to an extent, become proverbial millstones around the ' regional neck ' .

These harnessed the power of water or wind to turn the millstones.

No more will you be called tender or delicate. { 2 } take millstones and grind flour; take off your veil.

People nowadays often mistake ringing stones for granite nether millstones, which at a glance look quite similar.

Here you will find the four pairs of 4ft diameter French millstones.

nether millstones, which at a glance look quite similar.

overshot waterwheels that drive century-old French Burr millstones.

High quality millstones called querns were quarried for use in watermills.

tentering gear, one set per pair of millstones.

15 [52]), and millstones, salt (from a marsh at the east end of the harbour), and gypsum are still exported.

Rockland county quarries considerable trap rock, used mostly for road-making and concrete, and Ulster county has for more than a century produced most of the domestic millstones used in the United States.

The surface soil is clay in which are embedded fragments of siliceous sandstone, used for millstones and constructional purposes; the subsoil is limestone.

The sandstones are used for building, and for millstones and grindstones.

Millstones and pumice were also exported, but for the former the more gritty lava of Rocca Monfina was later on preferred.

Granite and other hard stones, having but a limited use (for millstones and the like), have the best chance of survival.

The large circular millstones of Roman age worked by horse-power are usually made from slices of granite columns.

The slurry, which is wet enough to flow, is ground between millstones so as to complete the process of comminution begun in the wash mill.

The grinding of the hard rock-like masses of clinker is effected between millstones, or in modern plants in ball-mills, tube-mills and edge-runners.

Minerals produced in small quantities include gypsum, millstones, salt and sandstone, and among those found but not produced (in 1902) in commercial quantities may be mentioned allanite, alum, arsenic, bismuth, carbonite, felspar, kaolin, marble, plumbago, quartz, serpentine and tin.

Buhrstone, a cellular variety of chalcedonic quartz from the Tertiary strata of the Paris basin, is largely used for millstones.

In the Persian period the city is said to have had 40,000 inhabitants; the population now consists chiefly of Tatars and Armenians, who carry on gardening, make wine and produce silk, salt and millstones.

High quality millstones called querns were quarried for use in watermills.

Overhead can be seen three sets of cast iron tentering gear, one set per pair of millstones.