Many forms observed in nature can be related to geometry, for example, the chambered nautilus grows at a constant rate and so its shell forms a logarithmic spiral to accommodate that growth without changing shape.

Though it more specifically refers to species Nautilus pompilius, the name chambered nautilus is also used for any species of the Nautilidae.

The chambered nautilus, Nautilus pompilius, is the best-known species of nautilus.

The chambered nautilus has more primitive eyes than some other cephalopods ; the eye has no lens and thus is comparable to a pinhole camera.

Small natural history collections were common in mid-19th century Victorian homes, and chambered nautilus shells were popular decorations.

A painting by Andrew Wyeth, entitled " Chambered Nautilus ," shows a woman in a canopied bed ; the composition and proportions of the bed and the window behind it mirror those of a chambered nautilus lying on a nearby table.

The popular Russian rock band Nautilus Pompilius ( Наутилус Помпилиус ) is named after the chambered nautilus.

Much of what is known about the extinct nautiloids is based on what we know about modern nautiluses, such as the chambered nautilus, which is found in the southwest Pacific Ocean from Samoa to the Philippines, and in the Indian Ocean off the coast of Australia.

This version of Ghatanothoa bears some resemblance to a chimera of deep-sea life, including the chambered nautilus.

This is found in the tentacles of the chambered nautilus and in the elephant proboscis ( trunk ).

Animals in exhibits include longsnout seahorse, leopard sharks, longnose gar, bonytail chub, Giant Pacific Octopus, chambered nautilus, tiger salamander, eastern hellbender, American alligator, loggerhead sea turtle, red lionfish, and snakehead, as well as

The most intriguing aspect of the S & W Magnum chambered for the new Jet is that it can also fire standard

Another example is the DeLisle carbine, a suppressed special operations carbine that was chambered for. 45 ACP.

A chambered cairn is a burial monument, usually constructed during the Neolithic, consisting of a cairn of stones inside which a sizeable ( usually stone ) chamber was constructed.

During the late Neolithic henge sites were constructed, single burials began to become more commonplace and by the Bronze Age it is possible that even where chambered cairns were still being built they had become the burial places of prominent individuals rather than of communities as a whole.

The burial chamber is normally located at one end of a rectangular or trapezoidal cairn, while a roofless, semi-circular forecourt at the entrance provided access from the outside ( although the entrance itself was often blocked ), and gives this type of chambered cairn its alternate name of court tomb or court cairn.

Barpa Langass on North Uist is the best preserved chambered cairn in the Hebrides.

Corrimony chambered cairn near Drumnadrochit is an example dated to 2000 BC or older.

An automatic rifle is a magazine-fed long gun, wielded by a single infantryman, that is chambered for rifle cartridges and capable of automatic fire.

: Chamber locks aim to block ammunition from being chambered, since most firearms typically cannot be discharged unless the ammunition is in the correct position.

A machine pistol is a handgun-style, often magazine-fed and self-loading firearm, capable of fully automatic or burst fire, and normally chambered for pistol cartridges.

Maeshowe ( or Maes Howe ; Norse: Orkhaugr ) is a Neolithic chambered cairn and passage grave situated on Mainland, Orkney, Scotland.

It gives its name to the Maeshowe type of chambered cairn, which is limited to Orkney.

The tomb gives its name to the Maeshowe type of chambered cairn, which is limited to Orkney.

Graham and Anna Ritchie cast doubt on this interpretation noting that there is no archaeological evidence for this claim, although a Neolithic " low road " connects Skara Brae with the magnificent chambered tomb of Maeshowe, passing near both of these sites.

Also known as Parc le Breos burial chamber, it is a partly restored Neolithic chambered tomb.

The chambered part of the ammonite shell is called a phragmocone.

Graham and Anna Ritchie cast doubt on this interpretation noting that there is no archaeological evidence for the claim, although a Neolithic " low road " connects Skara Brae with the chambered tomb of Maeshowe, passing near Brodgar and Stenness.

( Just as in a pistol, the case mouth prevents the round from entering too far into the chamber and it is perfectly feasible to fire such rounds in revolvers chambered for use with those cartridges without using a clip but case extraction is problematic.

* 7 × 64mm: One of the most popular long range varmint and medium-to big-game hunting cartridges in Europe, especially in the countries such as France and ( formerly ) Belgium where the possession of firearms chambered fro a ( former ) military cartridge is forbidden or is more heavily restricted.

This cartridge is offered by European rifle makers in both bolt-action rifles and a rimmed version, the 7 × 65mmR is chambered in double and combination rifles.

This chambered shell floats very well and therefore washes up easily and is familiar to beachcombers in the tropics.

The Canoidea superfamily ( or Caniformia suborder ) – Canidae ( wolves, dogs and foxes ), Mephitidae ( skunks and stink badgers ), Mustelidae ( weasels, badgers, and otters ), Procyonidae ( raccoons ), Ursidae ( bears ), Otariidae ( eared seals ), Odobenidae ( walrus ), and Phocidae ( earless seals ) ( the last three families formerly classified in the suborder Pinnipedia ) and the extinct family Amphicyonidae ( bear-dogs ) – are characterized by having nonchambered or partially chambered auditory bullae, nonretractable claws, and a well-developed baculum.

In the United States, the assault rifle design was later in coming ; the replacement for the M1 Garand of WWII was another John Garand design chambered for the new 7. 62 × 51mm NATO cartridge ; the select-fire M14, which was used by the U. S. military until the 1960s.

Bronze Age settlers also constructed megaliths at various sites, many of them dating from the second millennium BC, although the chambered cairns were replaced by burial cists, found on for example, Inchmarnock.

The M16A2 rifle entered service in the 1980s, being ordered in large scale by 1987, chambered to fire the standard NATO cartridge, the Belgian-designed M855 / M856 cartridge.

Unusually, no Maeshowe-type tombs have been found on Rousay and although there are a large number of Orkney – Cromarty chambered cairns, these were built by unstan ware people.

North Uist has many prehistoric structures, including the Barpa Langass chambered cairn, the Pobull Fhinn stone circle, the Fir Bhreige standing stones, the islet of Eilean Dòmhnuill ( which may be the earliest crannog site in Scotland ), and the Baile Sear roundhouses, which were exposed by storms in January, 2005.

*. 40 S & W — Smith & Wesson developed the cartridge but the first firearm to hit the market chambered in. 40 was manufactured by Glock

File: Smith and Wesson. 44 Hand Ejector 1st Model New Century Triple Lock Canadian Contract. 455 Webley-transparent. png | Smith and Wesson. 44 Hand Ejector 1st Model " New Century ", chambered for. 455, with British proof marks, likely used by British forces in WWI

Within the mound is a chambered passage, which can be accessed by an entrance on the south-eastern side of the monument.

Onta pottery is now produced full-time by ten families in Sarayama, five of whom continue to share and fire an eight chambered climbing kiln.

New shells are chambered by pulling a pump handle ( often called the fore-end ) attached to the tube magazine toward the user, then pushing it back into place to chamber the cartridge ( in a few cases this action is reversed ).

The Karabiner 98 Kurz ( often abbreviated Kar98k, K98, or K98k ) was a bolt action rifle chambered for the 7. 92 × 57mm Mauser cartridge that was adopted as the standard service rifle in 1935 by the German Wehrmacht.

* Cowboy action shooting is a competitive shooting sport which originated in the early 1980s that requires shooters to compete using firearms typical of the mid-to-late 19th century including single action revolvers, lever action rifles ( chambered in pistol calibers ) and side by side double barrel shotguns or pump action shotguns with external hammers.

* Vickers machine gun: earlier Maxims had been chambered for earlier British service cartridges, but the Vickers was produced for export available in most of the different calibres and cartridges used by countries around the world, and including a large caliber (. 50 inch ) as used on Royal Navy warships.

There is a common misconception that Spanish 1916 Mausers were chambered for 7. 62 CETME, a common round in use by the Spanish military ; however, the M1916 was actually chambered for 7. 62x51 NATO.

Originally chambered for the new. 45-75 WCF cartridge ( designed to replicate the. 45-70 Gov't ballistics in a shorter case ), versions in. 40-60,. 45-60 and. 50-95 Express followed ; the ' 76 in the latter chambering is the only repeater known to have been used in any numbers by the professional buffalo hunters.

This allowed the Model 1895 to be chambered for military cartridges with spitzer ( pointed ) projectiles, and the rifle was used by the armed forces of a number of nations including the United States, Great Britain, and Imperial Russia.

The MP7 is a German submachine gun manufactured by Heckler & Koch ( H & K ) and chambered for the HK 4. 6 × 30mm cartridge.

Corbelling, where rows of corbels gradually build a wall out from the vertical, has long been used as a simple kind of vaulting, for example in many Neolithic chambered cairns where walls are gradually corbelled in until the opening can be spanned by a slab.

In comparison, the U. S. M16A1 is chambered for the 5. 56mm NATO round, a derivative of the. 223 Remington civilian hunting cartridge and a less-powerful round than the 7. 62x51mm NATO (. 308 Winchester ) cartridge used by its predecessor the M-14, and the 30-06 Springfield cartridge used by the M1 Garand and Springfield M1903.