13th-century inventions

thumb|Man with glasses thumb|A woman with glasses

alt=|thumb|upright|A Soyuz-FG rocket launches from "[[Gagarin's Start" (Site 1/5), Baikonur Cosmodrome ]] A rocket (from , and so named for its shape) is an elongated flying vehicle that uses a rocket engine to accelerate without using any surrounding air. A rocket engine produces thrust by reaction to exhaust expelled at high speed. Unlike jet engines, rockets are fuelled entirely by propellant which they carry, without the need for oxygen from air; consequently a rocket can fly in the vacuum of space, indeed rocket engines operate more efficiently outside the atmosphere.

A cannon (plural either cannons or cannon) is a large-caliber gun classified as a type of artillery, which usually launches a projectile using explosive chemical propellant. Gunpowder ("black powder") was the primary propellant before the invention of smokeless powder during the late 19th century. Cannons vary in gauge, effective range, mobility, rate of fire, angle of fire and firepower; different forms of cannon combine and balance these attributes in varying degrees, depending on their intended use on the battlefield. A cannon is a type of heavy artillery weapon. The word cannon is derived

explosive weapon, concealed under or on the ground

thumb|upright=1.2|Crankshaft (red), pistons (gray), cylinders (blue) and flywheel (black)

thumb|Sailor bag made of canvas thumb|Canvas roof at the Erasmus metro station|Erasmus station of the [[Brussels Metro]] thumb|300px|One of Poland's biggest canvas paintings, the Battle of Grunwald, 1878, by [[Jan Matejko (426 cm × 987 cm (168 in × 389 in)), displayed in the National Museum in Warsaw]] Canvas is a durable plain-woven fabric used for making sails, tents, marquees, backpacks, shelters, as a support for oil painting and for other items for which sturdiness is required, as well as in such fashion objects as handbags, electronic device cases, and shoes. It is popularly used by arti

seamless, chronological and factual ordered recording of all business processes in a company based of documented evidence

thumb|A set of cams on a camshaft operating two valves

microscope that uses visible light

thumb|upright=1.35|Modern handguns (clockwise from top left):

earliest form of firearm used in 13th century China, 14th century Europe

thumb|The Saqiyah, c. 1905 thumb|alt=taken at Sikandra, India c1917 and titled near the time as 'A Punjabi Wheel'; from photo album of Robert Victor Soper, Private, Hampshire Regiment, in India 1916-19|'Punjab Wheel', India c.1917 A sāqiyah or saqiya (), also spelled sakia or saqia) is a mechanical water lifting device. It is also called a Persian wheel, tablia, rehat, and in Latin tympanum. It is similar in function to a scoop wheel, which uses buckets, jars, or scoops fastened either directly to a vertical wheel, or to an endless belt activated by such a wheel. The vertical wheel is itself a

mathematical device in which a small circle rotates inside a larger circle twice the diameter of the smaller circle

type of positive-displacement pump

component of a weight-driven clock

instrument to gather and measure the amount of solid precipitation (snow)

type of vertical windmill