* Both twins born vaginally-this can occur both presented head first or where one comes head first and the other is breech and / or helped by a forceps / ventouse delivery

The development of breech loading had the greatest effect on naval warfare, for the first time since the Middle Ages altering the way weapons are mounted on warships, and therefore naval tactics, now divorced from the reliance on sails with the invention of the internal combustion.

In the breech presentation the baby enters the birth canal with the buttocks or feet first as opposed to the normal head first presentation.

In the more common breech presentations, the baby ’ s bottom ( rather than feet or knees ) is what is first to descend through the maternal pelvis and emerge from the vagina.

* Second twins-If a first twin is born head down and the second twin is breech, the chances are good that the second twin can have a safe breech birth.

In Paris in 1808, in association with French gunsmith François Prélat, Jean Samuel Pauly created the first fully self-contained cartridges: the cartridges incorporated a copper base with integrated mercury fulminate primer powder ( the major innovation of Pauly ), a paper casing and a round bullet The cartridge was loaded through the breech and fired with a needle.

The first modern breech-loading rifled gun is a breech-loader invented by Martin von Wahrendorff with a cylindrical breech plug secured by a horizontal wedge in 1837.

External cephalic version is a process by which a breech baby can sometimes be turned from buttocks or foot first to head first.

The baby is moved up and away from the pelvis and gently turned in several steps from breech, to a sideways position, and finally to a head first presentation.

The very first cannons of the Middle Ages were breech loaded, with gunpowder and shot contained in pots dropped at the back of the barrel, but the poor seals made them dangerous, and they wore quickly and could not be scaled to larger weapons.

The Lahitolle 95 mm cannon of 1875 with an interrupted screw breech met the first three requirements to a great extent and partially solved the obturation problem.

Britain, France and the United States preferred screw breeches for most calibres, but the major drawback of the de Bange interrupted screw as first implemented was that only half of the circumference of the breech block could be threaded, and hence it needed to be fairly long to achieve safe locking of the breech, which required three separate motions to open after firing: rotate to unscrew, retract the screw and swing to the side.

In 1860 he joined Armstrong's armaments works in Elswick, Newcastle-upon-Tyne, first as joint manager and, from 1861, as a partner, where he continued research into artillery, in particular inventing ways of measuring breech pressures.

These were the first breech loaded rifles used in the British Army, and the original cartridges had a cardboard case.

He developed an interest in firearms at an early age, and he designed his first rifle — a breech loading rifle firing cardboard cartridges — in 1838, but this was turned down by the armed forces at the time.

The first designs submitted to the German Army featured a locked breech and a hidden hammer, but the Heer ( German Army ) requested that it be redesigned with an external hammer.

The P38 was the first locked-breech pistol to use a double-action / single-action ( DA / SA ) trigger ( the earlier double-action PPK was an unlocked blowback design, but the more powerful 9x19mm Parabellum round used in the P38 mandated a locked breech design ).

Christian Sharps, ( January 2, 1810-March 12, 1874 ) was the inventor of the Sharps rifle-the first commercially successful breech loading rifle.

While the gun is thought of by some to be the first bolt-action rifle, in reality it bears little resemblance to modern bolt-action rifles, except for the bolt principle itself which was applied to close the breech.

The Gatling gun, patented in 1861 by Richard Jordan Gatling, was the first to offer controlled, sequential fire with automatic loading.

The dirt and grime from prior shots was pushed down ahead of a tight bullet or ball ( which may have been a loose fit in the clean barrel before the first shot ), and, of course, loading was far more difficult, as the lead had to be deformed to go down in the first place, reducing the accuracy due to deformation.

The first revolvers were front loading, and were a bit like muskets in that the powder and bullet were loaded separately.

In many of the first generation of cartridge revolvers ( especially those that were converted after manufacture ), the pin on which the cylinder revolved was removed, and the cylinder taken from the gun for loading.

The usage calls attention to the paradox that a computer cannot run without first loading software but some software must run before any software can be loaded.

The second and third groups of eight bytes are treated as Channel Command Words ( CCWs ) to continue loading the startup program ( the first CCW is always simulated by the CPU and consists of a READ IPL command, < tt > 02h </ tt >, with command chaining and suppress incorrect length implied ).

The very first demonstration of loading coils on a telephone cable was on a 46-mile length of the so-called Pittsburgh cable ( the test was actually in Boston, the cable had previously been used for testing in Pittsburgh ) on September 6, 1899 carried out by Campbell himself and his assistant.

The confusion is easy to understand, Pupin himself claims that he first thought of the idea of loading coils while climbing a mountain in 1894, although there is nothing from him published at that time.

Despite the legal disputes surrounding this invention, it is unquestionable that Campbell was the first to actually construct a telephone circuit using loading coils.

This cable was the first use of continuous loading on any telecommunication cable.

It also included rudimentary support for embedded images ; the images were stored in PICT format in the file's resource fork in ascending numbers from zero, instances of non-breaking spaces in the text loaded up the appropriately numbered image, the first instance loading image " 0 ", the second space loading image " 1 ", and so on.

( rifled muzzle loading ) guns were at first fitted with a number of gun-metal studs arranged around them in a spiral manner corresponding to the twist of rifling.

GDOS was also responsible for loading up the drivers and any requested fonts when GEM was first loaded.

Although the original use and implied meaning may be disputed, it typically described preparations for charging the M1 Garand semi-automatic rifle by first locking the bolt back by pulling the charging handle rearward and then loading an 8-round en bloc clip into the now open magazine.

Second, colors can be mixed in at least four ways: ( 1 ) by completely mixing together on the palette the paints that exactly match a desired color ; ( 2 ) by loading together in a large brush the separate paints that approximately match the desired color, then letting these partially mix as the paint is applied to the paper ; ( 3 ) by laying down first a single paint color, then " dropping in " the remaining paint colors with the brush while the painted area is still wet ; ( 4 ) by glazing the paints as separate layers, one over another.

The Philips CD303 of 1983-1984 was the first player to adopt tray loading with sliding play mechanism.

Configured to carry passengers and ore, Otto Hahn made her first port call in Safi, Morocco, loading a cargo of phosphate ores, in 1970.

To set up the game, the included loading tray is used to stack the initial tower which has 18 levels of three blocks placed adjacent to each other along their long side and perpendicular to the previous level ( so, for example, if the blocks in the first level lie lengthwise north-south, the second level blocks will lie east-west ).

With their much lower wing loading, free-flight aircraft fly much slower than the engine-powered radio-controlled aircraft that many people first think of when ‘ model aircraft ’ is mentioned.

Poma is also known for building some very unusual lifts, mostly at Breckenridge Ski Resort, which include North America's only double loading chairlift ( Quicksilver Six ), the first high speed lift in Colorado with a midway load ( SuperConnect ), and the highest lift in North America, the Imperial Express SuperChair, at 12, 840 feet.

A special version is the container crane ( or " Portainer " crane, named by the first manufacturer ), designed for loading and unloading ship-borne containers at a port.

This statement recalls the 1959 Berlin crisis, when President Eisenhower first told reporters that Berlin could not be defended with conventional weapons and then added that a nuclear defense was out of the picture too.

For the first time in history the entire world is dominated by two large, powerful nations armed with murderous nuclear weapons that make conventional warfare of the past a nullity.

I state categorically that we shall under no circumstances resort to the use of such weapons unless they are first used by our enemies ''.

* 2003 – The first six-party talks, involving South and North Korea, the United States, China, Japan and Russia, convene to find a peaceful resolution to the security concerns as a result of the North Korean nuclear weapons program.

Bronze, an alloy of copper and tin, was the first alloy discovered, during the prehistoric period now known as the bronze age ; it was harder than pure copper and originally used to make tools and weapons, but was later superseded by metals and alloys with better properties.

* 1953 – Nuclear weapons testing: the Soviet atomic bomb project continues with the detonation of Joe 4, the first Soviet thermonuclear weapon.

* 1972 – Seventy-four nations sign the Biological Weapons Convention, the first multilateral disarmament treaty banning the production of biological weapons.

The first of these weapons entered United States Navy service in 1958.

The weapons system based on Phoenix was the world's first to allow simultaneous guidance of missiles against multiple targets.

During the first Gulf War the United Nations activated a biological and chemical response team, Task Force Scorpio, to respond to any potential use of weapons of mass destruction on civilians.

) Thus, when Odo returned, he was able to launch a near complete surprise attack on the besieging force, scattering it at the first attack, and slaughtering units caught resting or that fled without weapons or armour.

Though early thermal weapons, such as Greek fire, have existed since ancient times, the first widely used explosive in warfare and mining was black powder, invented in 9th century China ( see the history of gunpowder ).

The first Finnish Jägers had arrived in Finland on 31 October on a ship called Equity, carrying a large shipment of weapons from the German army.

The first serious local battles were fought during 9 – 21 January in southern and southeastern Finland, mainly to win the race for weapons and for control of the vital southeastern town of Viipuri.

This arrangement allows weapons first produced after 1986 to be used by actors in films and T. V.

* In Apogee of Fear, filmed in October 2008 and billed as " the first science-fiction movie made in space ", NASA astronaut Michael Fincke refers to the need to " fashion weapons out of a rudimentary lathe.

Governor William Sayle prepared for the uprising with three edicts: the first was that a nightly watch be raised throughout the colony ; second, that slaves and the Irish be disarmed of militia weapons ; and third, that any gathering of two or more Irish or slaves be dispersed by whipping.

While at the Los Alamos National Laboratory, Fuchs was responsible for many significant theoretical calculations relating to the first fission weapons and later, the early models of the hydrogen bomb, the first fusion weapon.

The transmutation of lithium atoms to helium in 1932 was the first fully man-made nuclear reaction, and lithium deuteride serves as a fusion fuel in staged thermonuclear weapons.

In terms of global significance, the first wheellock musket in Europe was sketched by Leonardo da Vinci around 1500 AD, although no use of metal flint for gunpowder weapons were known before that point in Europe.

At close range such large weapons were of little use, but an intact phalanx could easily keep its enemies at a distance ; the weapons of the first five rows of men all projected beyond the front of the formation, so that there were more spearpoints than available targets at any given time.

In 1956 the United Kingdom selected Malden as the " instrumentation site " for its first series of thermonuclear ( H-bomb ) weapons tests, based at Kiritimati ( Christmas Island ).