A postcard or post card is a rectangular piece of thick paper or thin cardboard intended.
for writing and mailing without an envelope. Shapes other than rectangular may also be.
used. There are novelty exceptions, such as wood postcards, made of thin wood, and
copper postcards sold in the Copper Country of the U.S. state of Michigan, and coconut
“postcards” from tropical islands.
In some places, one can send a postcard for a lower fee than for a letter. Stamp
collectors distinguish between postcards (which require a stamp) and postal cards.
(Which have the postage pre-printed on them). While a postcard is usually printed by a
private company, individual or organization, a postal card is issued by the relevant postal.
authority.
The Gatling gun is one of the best-known early rapid-fire springs loaded, hand cranked.
weapons and a forerunner of the modern machine gun. Invented by Richard Gatling, it.
is known for its use by the Union forces during the American Civil War in the 1860s,
which was the first time it was employed in combat.
Later, it was used again in numerous military conflicts, such as the Bohin War, the
Anglo-Zulu War, and the assault on San Juan Hill during the Spanish American War.
It was also used by militias and the National Guard in episodes of the Great Railroad
Strike of 1877, specifically in Pittsburgh, Pennsylvania.
The Gatling gun’s operation centered on a cyclic multi-barrel design which facilitated.
cooling and synchronized the firing-reloading sequence. Each barrel fired a single shot.
when it reached a certain point in the cycle, after which it ejected the spent cartridge,
loaded a new round, and, in the process, allowed the barrel to cool somewhat. This
configuration allowed higher rates of fire to be achieved without the barrels.
overheating.
Linoleum, also called Lino, is a floor covering made from renewable materials such as
solidified linseed oil (linoxyn), pine rosin, ground cork dust, wood flour, and mineral
fillers such as calcium carbonate, most commonly on a burlap or canvas backing.
Pigments are often added to the materials to create the desired color finish.
The finest linoleum floors, known as “inlaid”, are extremely durable, and were made by.
joining and inlaying solid pieces of linoleum. Cheaper patterned linoleum came in.
different grades or gauges and were printed with thinner layers which were more prone.
to wear and tear. High quality linoleum is flexible and thus can be used in buildings.
where a more rigid material (such as ceramic tile) would crack.
A socket wrench is a type of wrench or spanner that has a socket attached at one end,
usually used to turn a fastener.
The most prevalent form is the ratcheting socket wrench, often improperly called a
ratchet. A ratcheting socket wrench is the device within a hand tool in which a metal.
handle is attached to a ratcheting mechanism, which attaches to a socket, which in turn
fits onto a type of bolt or nut.
Pulled or pushed in one direction, the ratchet loosens or tightens the bolt or nut.
attached to the socket. Turned the other direction, the ratchet does not turn the socket.
but allows the ratchet handle to be re-positioned for another turn while staying attached.
to the bolt or nut.
Lesson Learning 