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This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Honduras has a general copyright term of 75 years, but it does implement the rule of the shorter term.
The andon is a lamp consisting of paper stretched over a frame of bamboo, wood or metal. [1] The paper protected the flame from the wind. Burning oil in a stone, metal, or ceramic holder, with a wick of cotton or pith, provided the light. They were usually open on the top and bottom, with one side that could be lifted to provide access. [2]
A study in 1981 estimated that the dose from using a thorium mantle every weekend for a year would be 3–6 microsieverts (0.3–0.6 mrem), tiny in comparison to the normal annual background radiation dose of around 2.4 mSv (240 mrem), although this assumes the thorium remains intact rather than airborne. A person actually ingesting a mantle ...
These lamps have handles, short, plain nozzles, and less artistic finishing. Frog This is a regional style lamp exclusively produced in Egypt and found in the regions around it, between c. 100 and 300 AD. The frog is an Egyptian fertility symbol. African Red Slip Lamps made in North Africa, but widely exported, decorated in a red slip.
A garden solar lamp A child in Zambia studying by the light of a lamp charged by solar power during the day. A solar lamp, also known as a solar light or solar lantern, is a lighting system composed of an LED lamp, solar panels, battery, charge controller and there may also be an inverter.
A carbide lamp or acetylene gas lamp is a simple lamp that produces and burns acetylene (C 2 H 2), which is created by the reaction of calcium carbide (CaC 2) with water (H 2 O). [ 1 ] Acetylene gas lamps were used to illuminate buildings, as lighthouse beacons, and as headlights on motor-cars and bicycles.
The Geordie lamp was a safety lamp for use in flammable atmospheres, invented by George Stephenson in 1815 as a miner's lamp to prevent explosions due to firedamp in coal mines. Origin [ edit ]