These were used in cranes and aboard ships in Ancient Greece, as well as in mines, water pumps and siege engines in Ancient Rome.

These were developments that had begun before the Industrial Revolution, but the adoption of James Watt's more efficient steam engine from the 1770s reduced the fuel costs of engines, making mines more profitable.

These had turbines, twelve 10. 5 cm guns as main armament, but were also equipped to carry and lay 100 mines.

These killing tunnels (" mines ") were at first collapsed to destroy targets located above, but they were later filled with explosives and detonated in order to cause greater devastation.

These odd sanctuaries have proven so popular and lucrative for ecotourism that efforts exist to prevent removal of the mines.

These facts pose serious difficulties in many developing nations where the presence of mines hampers resettlement, agriculture, and tourism.

These were used extensively in the copper mines at Rio Tinto in Spain, where one sequence comprised 16 such wheels arranged in pairs, and lifting water about.

These books detail many different mining methods used in German and Saxon mines.

These shared the profits of the silver mines in southern Iberia with the Barcas family and closely followed Hellenistic diplomatic customs.

These may be the first known mines.

These include narrow and standard gauge railways, coal and silver mines, shafts and its equipment from 19th and 20th century.

These were the forerunners of modern land mines.

These mines eject tripwires to act as booby traps, and when triggered are launched upward before exploding.

These subsequently decay into muons, which are able to reach the surface of the Earth, and even penetrate for some distance into shallow mines.

These were used for pumping water out of the Cornish Tin mines, and therefore the efficiency and efficacy of the engines was an important factor in the amount of tin, and money, which could be extracted from a mine.

These Germans were invited by King Géza II of Hungary to develop towns, build mines, and cultivate the land of Transylvania at different stages between 1141 and 1162.

These mines reached their peaks during the 1880s and 1890 ’ s, when over 200 stamp mills crushed quartz ore brought in by hand cars on track from the mines.

These two deaths with the addition of January's Sago Mine disaster and the Aracoma Alma Mine disaster caused West Virginia Governor Joe Manchin to close all of West Virginia's mines in a " mine safety stand-down.

These mines yield uranium ores, which are then processed to produce yellowcake, crucial to the nuclear power industry ( as well as aspirational nuclear powers ).

These mines were the primary employers well into the 1980s.

These mines averaged a daily output of 2, 000 tons.

These layoffs led to a labor strike by the Knights of Labor which shut down the mines.

These included his walks on the Brocken and his visit to the mines in Rammelsberg.

These mining operations generally focused on discovering either lead or silver ore ; the company appointed Philip Francois Renault as commander of the mines, and in 1723 Boisbriand ceded land to Renault in Washington County ( in an area now known as the Old Mines ) and in the Mine La Motte area.

These include emissions of airborne pollution in the form of dust, gases, noise and vibration when operating machinery and during blasting in quarries, and damage to countryside from quarrying.

These were transported from quarries at Balatai and they had to be lifted up once they arrived at the site, presumably by a ramp.

These are where quarries, disused railway cuttings, cliffs or outcrops give access to extensive geological features, such as particular rock layers.

These granite quarries continued in service well into the 20th century.

These include mining operations ( some open to the public ), a visitor's centre and lookout on top of the original Line of Lode mine, historic buildings, town history walking trails, many resident artists and galleries, the Sculpture Symposium, COBB & Co coach & wagon rides, Silverton Camel Farm, Stephen's Creek, several quarries, lakes, the Mundi-Mundi plains, and terrific sunsets.

These quarries, which are now almost exhausted, have been operating since the beginning of the 16th century to make razor stones prized for their longevity.

These quarries have been worked since the mid-19th century with the final dimension stones coming out of Independent in 2006, although some stocks of Portland stone block still remain.

These man-made ' caves ' were used as Marl quarries from the 13th century onwards.

These quarries also supplied stone for construction elsewhere in the town, proving to be particularly profitable.

These quarries have then been used for housing.

These artifacts are found at quarries in Goatfell, Harvey Mountain, Idaho, Negro Lake and Kiakho Lake ( both near Lumberton and Cranbrook ), North Star Mountain just west of Creston on Highway 3, and at Blue Ridge.

These quarries were later used as landfill for waste.

These quarries provided slate for the West Castleton Railroad and Slate Company, a complex of sixty to seventy buildings that stood between Glen Lake and Lake Bomoseen.

These include guard towers, quarries, a blacksmith's shop and a gunpowder magazine

These are an extensive system of underground quarries, worked for Green Slate.

These include ranches and fishing huts, which produce meat, small and large farms, which produce corn, quarries and mines which produce stone, gold and jade and lumberyards, which produce wood.

These were used almost exclusively within slate quarries.

These facilities had been built in quarries cleared through the excavation of Bath stone.