Hero of Alexandria ( Heron ) ( c. 60 ) described a principle of reflection, which stated that a ray of light that goes from point A to point B, suffering any number of reflections on flat mirrors, in the same medium, has a smaller path length than any nearby path.

The Fleet Air Arm has a museum near RNAS Yeovilton ( HMS Heron ) in Somerset, England at which many of the great historical aircraft flown by the Service are on display, along with aircraft from other sources.

Birds include Osprey, Great Blue Heron, Bald Eagle and Peregrine Falcon, the last two of which were threatened by DDT ; their numbers plummeted but have risen in recent years.

The Heron is painted as G-AOXL of Morton Air Services, which was the aircraft that flew the last passenger flight from Croydon on 30 September 1959.

Its Order of the Arrow counterpart is the Blue Heron Lodge, which was founded in 1946 when a team from Octoraro Lodge in Pennsylvania inducted the first members of Blue Heron Lodge.

A modern proof, which uses algebra and is quite unlike the one provided by Heron ( in his book Metrica ), follows.

) He subsequently established the Blue Heron Press, which allowed him to continue publishing under his own name throughout the period of his blacklisting.

The Great Blue Heron is replaced in the Old World by the very similar Grey Heron, which differs in being somewhat smaller ( 90 – 98 cm ), with a pale gray neck and legs, lacking the browner colors that Great Blue Heron has there.

It forms a superspecies with this and also with the Cocoi Heron from South America, which differs in having more extensive black on the head, and a white breast and neck.

The subspecies differ only slightly in size and plumage tone, with the exception of subspecies occidentalis, which as well as normal colored birds, also has a distinct white morph, known as the Great White Heron ( not to be confused with the Great Egret, for which " Great White Heron " was once a common name ).

More superficially similar is the slightly smaller Grey Heron, which may sometimes vagrate to the Northern coasts of North America.

The Grey ( which occupies the same ecological niche in Eurasia as the Great Blue Heron ) has very similar plumage but has a solidly soft-gray neck.

The largest species of heron is the Goliath Heron, which stand up to tall.

The most atypical bill is owned by the Boat-billed Heron, which has a broad thick bill.

Some species are partially migratory, for example the Grey Heron, which is mostly sedentary in Britain but mostly migratory in Scandinavia.

Individual species may be generalists or specialise in certain prey types, like the Yellow-crowned Night Heron, which specialises in crustaceans, particularly crabs.

The wings may be used to frighten prey ( or possibly attract it to shade ) or to reduce glare ; the most extreme example of this is exhibited by the Black Heron, which forms a full canopy with its wings over its body.

The exception to this is the Boat-billed Heron, which pairs up away from the nesting site.

Over 10, 200 Heron sail numbers have been issued since the design first appeared in the late 1950s.

* New skyscrapers to be built at Canary Wharf including the Riverside South towers, the Heron Quays West double-skyscraper development and the North Quay project, consisting of three towers.

The formula is credited to Heron ( or Hero ) of Alexandria, and a proof can be found in his book, Metrica, written c. 60.

The theory that Great White Heron may be a separate species ( A. occidentalis ) from Great Blue Heron has again been given some support by David Sibley.

The " Great White Heron " could be confused with Great Egret but is larger, with yellow legs as opposed to the Great Egret's black legs.

The Reddish Egret and Little Blue Heron could be mistaken for the Great Blue Heron, but are much smaller, and lack white on the head and yellow in the bill.

The Boat-billed Heron ( Cochlearius cochlearius )-colloquially known as the Boatbill-is an atypical member of the heron family, and was formerly thought to be in a monotypic family, Cochlearidae.

It is somewhat smaller than the Grey Heron, from which it can be distinguished by its darker reddish-brown plumage, and, in adults, darker grey back.

Edward Hall says that Lady Heron was a prisoner ( in Scotland ), and negotiated with James IV and the Earl of Surrey her own release and that Ford Castle would not be demolished for an exchange of prisoners.

However the Mirror and her larger sisters, and the Heron, can also be regarded as coming into this category.

Sometimes the Olympic triangle is used as a course for dinghy races where space permits, particularly for events where there ought be little local advantage such as State and National titles and for classes which are mainly displacement sailing such as the Heron ( dinghy ).

This bird was long considered to be conspecific with the closely related North American species, the Green Heron, which is now usually separated as B. virescens, as well as the Lava Heron of the Galápagos Islands ( now B. sundevalli, but often included in B. striata, e. g. by BirdLife International ); collectively they were called " green-backed herons ".

Stone Telling's narrative may be seen as a return to the theme of The Dispossessed and The Eye of the Heron, in which a person from an anarchistic society visits an acquisitive government-ruled society and returns.

Numerous wading bird species can be found in the wetlands of the sanctuary, including the Yellow-crowned Night Heron, Black-crowned Night Heron, Tricolored Heron, Great Egret, and Snowy Egret.

Most racing dinghies can be classified as being either single handed ( one person only ) such as the Laser, RS Vareo or double handed, such as the 470, 505, Heron, Tasar, Flying Junior, International Fireball or the International Fourteen.

The Heron dinghy was designed to be built by a home handyman out of marine ply over a timber frame, but can now also be constructed from marine ply using a stitch and glue technique or from Fibreglass.

It is similar to a third century AD work by Heron of Alexandria.

* Life may have survived ' Snowball Earth ' in ocean pockets BBC News online ( 2010-12-14 ) report on research presented in the journal Geology by Dr Dan Le Heron ( et al.

In the BBC radio dramatizations, Gandalf has been voiced by Norman Shelley in The Lord of the Rings ( 1955 – 1956 ), Heron Carvic in The Hobbit ( 1968 ), Bernard Mayes in The Lord of the Rings ( 1979 ) and Sir Michael Hordern in The Lord of the Rings ( 1981 ).

IAI Heron, an Unmanned Aerial Vehicle developed by the Malat ( UAV ) division of Israel Aerospace Industries.

Conversely, the remarkably accurate calculation of the earth's circumference by Eratosthenes, and the invention of a steam engine by Heron, both ascribed in chapter 60 to the priest Menes, historically occurred in Alexandrian Egypt, centuries after the period of the novel.

* A syringe-like device was described by Heron to control the delivery of air or liquids.

A sculpture by Martin Heron, entitled " For the Love of Emer ", depicting Cú Chulainn balancing on a tilting 20-foot pole, representing the feat of balancing on the butt of a spear he learned from Scáthach, was installed in Armagh in 2010.

The new 48-floor building, funded by the City of London and developed by Heron International, will house a 650-seat concert hall, a 220-seat theatre and a 90-seat studio theatre, as well as studios for television, radio, teaching, rehearsal, office and support services.

Heron Lake is located in Minnesota's 1st congressional district, represented by Mankato educator Tim Walz, a Democrat.

At the state level, Heron Lake is located in Senate District 22, represented by Republican Doug Magnus, and in House District 22B, represented by Republican Rod Hamilton.

Heron Lake Township is located in Minnesota's 1st congressional district, represented by Mankato educator Tim Walz, a Democrat.

At the state level, Heron Lake Township is located in Senate District 22, represented by Republican Doug Magnus, and in House District 22B, represented by Republican Rod Hamilton.

West Heron Lake Township is located in Minnesota's 1st congressional district, represented by Mankato educator Tim Walz, a Democrat.

At the state level, West Heron Lake Township is located in Senate District 22, represented by Republican Doug Magnus, and in House District 22B, represented by Republican Rod Hamilton.

Ctesibius of Alexandria is credited with inventing the first fire pump around the 2nd century B. C., and an example of a force-pump possibly used for a fire-engine is mentioned by Heron of Alexandria.

* " Heron ", a song by Avail from their 2000 album One Wrench

* Heron % 27s fountain, a hydraulic machine invented by physicist Heron aka " Hero of Alexandria "