A lighthouse is a tower, building, or other type of structure designed to emit light from a system of lamps and lenses and used as an aid to navigation for maritime pilots at sea or on inland waterways.

For example, the Racket language extends the notion of a macro system to a syntactic tower, where macros can be written in languages including macros, using hygiene to ensure that syntactic layers are distinct and allowing modules to export macros to other modules.

The system pumps molten salt through a tower heated by the sun's rays.

The clock tower ( referred to as " Town Clock ") is equipped with a ship's signal bell system.

A water tower is an elevated structure supporting a watertank constructed at a height sufficient to pressurize a water supply system for the distribution of potable water.

The height of the tower provides the pressure for the water supply system, and it may be supplemented with a pump.

The water tower reduces the need for electrical consumption of cycling pumps and thus the need for an expensive pump control system, as this system would have to be sized sufficiently to give the same pressure at high flow rates.

A tower high with a system to drop a “ car ” suspended by a cable of “ best rubber ” was proposed for the Chicago World Fair, 1892-1893.

The Macau Tower Bungy has a " Guide cable " system that limits swing ( the jump is very close to the structure of the tower itself ) but does not have any effect on the speed of descent, so this still qualifies the jump for the World Record.

To support the tower ’ s record heights and slim footprint, he developed the “ buttressed core ” structural system, consisting of a hexagonal core reinforced by three buttresses that form a Y shape.

Bill Baker, the Chief Structural Engineer for the project, invented the buttressed core structural system in order to enable the tower to achieve such heights economically.

Cottingham recommended new beams throughout the roof and a new steeper pitch, removal of the spire and new timbers in the tower, new paving, ironwork to hold the west transept wall up, a new stone south transept window, new buttresses, a new drainage system for the roof, new ironwork on almost all the windows, and on and on.

The second was the mid-level spray system, using either a pop-up spray tower extending upward from the base using water pressure to extend the tower during washing, or a fixed tower spray arm supplying water to a secondary rotating arm suspended below the upper rack ( s ).

Two versions were shown at the time ; one was a card that connected to the Mega ST bus expansion slot, the second version was a stand-alone tower system containing a miniaturized Mega ST inside.

Additional modifications or improvements included liquid hydrogen and liquid oxygen storage tanks, a payload preparation room, payload changeout room, a new launch tower with escape system for the shuttle crewmembers, sound suppression system and water reclamation area and a Shuttle Assembly Building were added to the original complex.

The village received a state grant of $ 400, 000 in 2001 to connect to the Good Hope water supply system and to build a water tower.

This time however the new tower blocks integrated shopping malls, parking system and other convenient facilities.

A water system became a reality in 1936 when the water tower was built.

In early California and some other states the windmill was part of a self-contained domestic water system including a hand-dug well and a redwood water tower supporting a redwood tank and enclosed by redwood siding ( tankhouse ).

The chimney of the heating system at the front of the college substitutes visually for the missing chapel tower.

By far the most common two are known as " calling up " and " calling down "; each has its merits and inconveniences, but generally any given tower will consistently use one system in preference to the other.

Wright ’ s original plan for an adjoining tower, artists ’ studios and apartments went unrealized, largely for financial reasons.

It is believed that at this point, Whitman ceased to fire from above above the parapet surrounding the observation deck and instead chose to fire through waterspouts located upon each side of the tower walls ; allowing him to fire largely protected from gunfire below, but also greatly limiting his range of targets.

This includes two magnificent 15th century churches, the largely intact 17th century city walls, gates and tower ( the Drommedaris, see picture ) and the 17th century city hall.

This designation was largely due to Newtown's historic clock tower.

The church tower was constructed around a century later, and is largely unmodified throughout the centuries.

The only remaining and largely undamaged structure was the water tower, which had to be repaired and repainted.

A major focus of his career was the remodelling of older country houses, his first major commission was the transformation of Henry Holland's Trentham Hall, Staffordshire ( 1834 – 40 ) it was remodelled in the Italianate style with a large tower ( a feature Barry often included in his country houses ), Barry also designed the Italianate gardens, with parterres and fountains, largely demolished in 1912, only a small portion of the house consisting of the porte-cochère, with a curving corridor and the stables are still standing, although the gardens are undergoing a restoration, additionally the belvedere from the top of the tower survives as a folly at Sandon Hall.

Old Court, whose construction began in 1880 and is built in red brick in the Victorian Late Perpendicular Gothic Revival style, was largely designed by Sir Arthur Blomfield and comprises seven staircases ( A to G ), together with a tower and gateway, Master's Lodge, Chapel, Hall, Kitchens, Music Practice Room, and Archives.

That tower was on a different site and was largely destroyed in 1203, during the Fourth Crusade of 1202 – 1204.

Known among the Byzantines as the Megàlos Pyrgos ( meaning " Great Tower " in Greek ), this tower was largely destroyed by the Latin Crusaders during the Fourth Crusade in 1204.

In 1834-6, he largely rebuilt the church of St Andrew, Hove, which had been in ruins since the collapse of its tower some years earlier.

The channel 5 transmitter was shut down when Toronto's CBLT switched from channel 6 to channel 5, and became largely redundant as a result of CKVR's increased transmission tower height in the early 70's.

The tower and spire was built around 1480, replacing an older one, and the south wall was largely rebuilt in the 19th century.

It was largely destroyed by enemy action on 16 April 1941 and rebuilt in the 1950s incorporating the medieval tower and reusing much of the flint and fragments of the original stone building.

The church, except for the tower, was largely rebuilt in brick by John, earl of Bridgewater in 1811.

Though of earlier foundation the structure of the building is largely 15th century: there are two aisles and the tower is west of the north aisle.

The original keepers ' houses, roofless but largely complete, survive below the tower.

Sunbury is a largely residential town however has five or six high rise tower blocks: one commercial ; two and a half-size block residential ; and two hotels.

WBZ re-established an FM station on December 15, 1957, transmitting from the brand new WBZ-TV tower in Needham, operating at 106. 7 MHz ; this incarnation of WBZ-FM only provided limited simulcasts of the AM station and largely had its own programming, including classical music and Ed Beech's Just Jazz program from WRVR in New York City.

Furthermore, while until the Komnenian period the reconstructions largely remained true to the original model, later modifications ignored the windows and embrasures on the upper store and focused on the tower terrace as the sole fighting platform.

Its buildings, including a widely visible square tower, largely ruined church, cloisters, refectory and small chapter house, are the best-preserved of any Scottish medieval monastic house.

There are two largely used single reel systems ( also known as long-play systems ) today: the tower system ( vertical feed and takeup ) and the platter system ( non-rewinding ; horizontal feed and takeup ).