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How are marbles made?

Background

Marbles are small, round, spherical objects made from glass or stone and most commonly used in children's games. They are usually less than an inch (2.54 cm) in diameter and often brightly colored or otherwise decorated. Their origins as recreational objects appear to date back several thousand years, and it is also believed that the primitive games played with marbles eventually evolved into the sports that we now know as bowling, billiards, and pinball. Marbles have numerous industrial uses as well—they are the noise inside a can of spray paint and the translucent letters and numbers on a road sign. Marbles are also melted down to make fiberglass, used in automotive bodies and draperies.

History

Small, round objects made from stone have been unearthed in the excavations of ancient cultures all around the globe. The antecedent of the marble was probably the nut, polished by youngsters in ancient times into a smooth surface for playing games. Both Greek and Roman youths played games with small balls made from clay, and marbles were discovered in the tomb of the young Egyptian pharaoh Tutankhamen. In North America, objects of stone and clay that appear to be marbles have been unearthed from several sites. One of the most famous is the Hopewell burial sites in Ohio. Marbles and marble games for children continued to be a popular form of entertainment well through the Middle Ages. Unfortunately, youngsters playing marble games came to be seen as delinquents, and efforts were made to restrict their marble-playing activities.

Most of the marbles used in medieval and Elizabethan times were made from clay. Around 1600, water-powered stone mills in Germany began producing more polished versions from the marble and alabaster quarries nearby, especially in the regions near Coburg and Oberstein. The word marble is derived from the German term "for the rock," and has come to mean any small, round sphere used as such. Soon the mills began grinding out versions from agate, limestone, brass, and gemstone, and these large operations could grind a marble into shape at the rate of about 800 an hour. This made Germany the center of marble manufacturing for several centuries.

Glass marbles, the most common version of the object today, only came into existence relatively recently in the history of the object. It is debated whether they originated in Venice, where glassblowing had become a well-developed industry since the ninth century, or back in Germany. Historians point to 1846 as the invention of marbelschere (marble scissors) by a glass factory employee in Germany. This tool resembled a pair of tongs with a small cup on one end and a slicing device on the other. A molten glass rod would be forcefully inserted into the cup, and the worker would then twist the cup, which would help form the sphere of the marble. Squeezing the tongs shut sliced off the rest of the glass. Such marbles can be identified by their pontil marks, the two tiny tags at each end of the sphere where the cooling glass was severed from the rest of the rod. The objects were further cooled inside a wooden barrel and then taken up with an iron spoon and inserted into an annealing oven, a process which yielded a tougher piece of process which yielded a tougher piece of glass not likely to break or become brittle.

Marble manufacturing migrated to American shores in the later decades of the 19th century. In 1900 Martin Frederick Christensen received a patent for a machine that made near-perfect spheres of steel ball bearings. The first machine-made marbles were manufactured in a barn behind Christensen's house in Ohio, which eventually led to a prosperous manufacturing facility. By 1910 the 33 workers at the M.F. Christensen and Son plant were producing 10,000 marbles a day. The furnaces were fired by natural gas, however, and the onset of World War I brought rationing of the resource and spelled the fiscal end of Christensen's operation.

Akro Agate Company, founded in 1911 and originally based in Akron, Ohio, became the next major marble manufacturer. Further refinements in marble-making machinery came during the 1920s, and Akro Agate enjoyed a position as the major marble manufacturer during the subsequent decades. But the popularity of marbles as toys waned as more sophisticated gadgets entered the children's toy market. Many of the American marble manufacturing firms countered this by diversifying operations into industrial glass production, such as making automobile windshields.

Today, marbles are still produced in record numbers, but most are made in Third World factories. One such operation, Vacor de Mexico, located in Guadalajara, produces about 12 million marbles a day, which are then shipped to 35 different countries.

Raw Materials

Modern marbles are made from a combination of sand, soda lime, silica, and several other ingredients added for pigment or decoration. These other additives range from aluminum hydrate to zinc oxide. The primary component, sand, is essentially loose, granular particles of disintegrated rock. Soda lime is the chemical term for the mixture of calcium hydroxide and sodium or potassium hydroxide. It is a drying agent and absorbs carbon dioxide. Another compound used in marble manufacturing is silica, a white or colorless crystalline found in agate, flint, quartz, and other rocks. Some marbles are also made from cullet, or scrap glass.

The Manufacturing
Process

Meltdown

  • Sand, soda lime, and crushed cullet are fed into a large, furnace-driven tank. In the tank, the mixture is heated to 2300°F (1260°C) to melt the raw materials. This can take as long as 28 hours.

Injection

  • Next, the molten mixture moves out of the tank through an opening into another vat known as the flow tank. There an opening in the tank injects molten colored glass. This hot, pigmented glass gives the marbles their distinct appearance. A green marble has been injected with glass containing iron oxide; cobalt results in a blue marble; and manganese will yield a purple one. The use of uranium oxide gives marbles an eerie, greenish-yellow cast. The speed and force of the injection determines the final design of the marble. A grooved feeder device, patented by the Akro Agate Company, was able to produce multicolored marbles known as corkscrews.

Cutting and cooling

  • Next, the still-molten glass is released from the flow tank as globs of glass. Automatic cutting devices slice the mixture into equal parts. The globs travel down metal ramps that simultaneously cool them and perfect their spherical shape. Next, they travel down a second metal slide and are sorted by hand. These grooved rollers were the invention of Horace Hill, a former employee of Christensen and Son and later founder of Akro Agate. This device produced marbles much more quickly and reduced the labor necessary by nearly two-thirds. Marbles with flaws are sent back to another area of the factory for re-melting. The marbles cool off in 5-gallon (19 1) containers that house 5,000 marbles at a time.

Where To Learn More

Books

Barrett, Marilyn. Aggies, Immies, Shooters, and Swirls: The Magical World of Marbles. Bulfinch Press, 1994.

Ferretti, Fred. The Great American Marble Book. Workman Publishing, 1973.

Periodicals

Block, Stanley A. "The Akro Agate Company." Antiques and Collecting, April 1988, pp. 38-40.

"Marbles: An American Industry Still Involved in a Shoot-Out." Compressed Air, July-August 1994, pp. 22-29.

[Article by: Carol Brennan]


 
 
Hacker Slang: marbles

[from mainstream “lost all his/her marbles”] The minimum needed to build your way further up some hierarchy of tools or abstractions. After a bad system crash, you need to determine if the machine has enough marbles to come up on its own, or enough marbles to allow a rebuild from backups, or if you need to rebuild from scratch. “This compiler doesn't even have enough marbles to compile hello world.


 
WordNet: marbles
Note: click on a word meaning below to see its connections and related words.

The noun has one meaning:

Meaning #1: a children's game played with little balls made of a hard substance (as glass)


 
Wikipedia: marbles
Hand-made marbles from West Africa
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Hand-made marbles from West Africa
Different glass marbles from a glass-mill
Enlarge
Different glass marbles from a glass-mill


Marbles is a class of children's games played with glass, clay, or agate balls usually about ½ inch (1.25 cm) across. However, they may range from less than ¼ inch (0.635 cm) to over 3 inches (7.75 cm), while some art glass marbles for display purposes are over 12 inches (30 cm) wide. Marbles are often collected, both for nostalgia and for their aesthetic appeal.

History

Marbles are often mentioned in Roman literature, and there are many examples of marbles from ancient Egypt. They were commonly made of clay, stone or glass.

Ceramic marbles entered inexpensive mass production in the 1870s.

Glass marbles were invented around 1848 in Germany[1], and entered mass production in the early 20th century when World War I cut off their importation from Europe, causing American industry to be applied to the task, producing a mechanized method of glass marble production which became the most common system in the world. Glass marbles, too, became the most popular variety, and have remained so to this day.

In some developing countries, children use steel, minerals or large rocks as a less pricey marble substitute.

Gameplay


One version of the game involves drawing a circle in sand, and players will take turns knocking other players' marbles out of the circle with their own marble. This game is called ringer. Other versions involve shooting marbles at target marbles or into holes in the ground. A larger-scale game of marbles might involve taking turns trying to hit an opponent's marble to win. A useful strategy is to throw a marble so that it lands in a protected, or difficult location if it should miss the target. As with many children's games, new rules are devised all the time, and each group is likely to have its own version, often customized to the environment.

One such specialized game is called gaipar, popular in Bengal. Each player contributes four marbles, which are positioned on the edge of a rectangle. One special marble (the gai) is placed in the center. Players take turns to hit the marbles on the rectangle with a bigger marble (often called a boulder or matris). The marbles hit by the matris must be propelled out of the rectangle. If they are hit but remain within the rectangle, the player plays one more marble as a forfeit which is placed within the rectangle. The aim of the game is to hit the central gai and take it out of the rectangle. This is not easy when there are marbles on the periphery. If a player can take out the gai, he wins all the marbles. However, other players then get a chance to hit the gai-taker's boulder and, if successful, all the marbles change ownership.

Yet another specialized version of the game (as played in Taiwan) involves a five-holed course and can be played by two to six players. This version is typically played on a flat hard-packed clay surface. Five divots, approximately 2 cm deep and 4 to 5 cm wide, are excavated in the four corners of a 1.5m by 1.5m square. The fifth divot is excavated in the center of the square where the square's diagonals intersect. The players each begin with one marble and a series of games of "rock-paper-scissors" determines the starting order of the players. The beginning player starts at one of the holes in the corner of the square and this hole becomes the designated "home" hole for the remainder of the game. The first player shoots for the center hole. If he or she successfully shoots his or her marble into the center hole (namely the marble comes to rest in the hole without bouncing out), then he or she gets to shoot for the hole to the right. In the event of a miss, the next player in line gets to start and he or she also can proceed until a shot misses a hole. The idea is to shoot the marble from the home hole to center, from center to right, right back to center, center to left, left back to center, center to top, top back to center, and finally from center back to home. The first player to complete this course becomes the "ghost" and is at liberty to shoot at the other players' marbles as they attempt to complete the course. If the ghost successfully hits another player's marble, the ghost then wins that marble and the losing party removes the marble from play and surrenders the marble to the ghost immediately. Although the ghost wins the match immediately upon completing the course, the game is not over until all players have either completed the course or had their marbles removed from play by the ghost.

In Eastern Europe, where children play more with marbles and less with expensive technological toys, there is often a value system for the most commonly circulated marbles. The most common type is completely transparent, with two colored streaks running through the glass. A marble with three streaks, or with artful thin streaks, is worth two "plain" ones. A white non-transparent marble called "bonja" in Croatian (pronounced bo-nya, origin unknown) is also worth two. A black bonja is usually worth between three and four plain ones, although they are more often traded for more valuable marbles, not less. A green non-transparent marble is among the rarest, and can fetch up to ten "plain" marbles but again most kids would use such a valuable asset to purchase something more luxurious-seeming than a large number of "plains." The most valuable marbles are "sunny" marbles. They are semi-transparent, of colored glass, most often red or brown, although green, blue and gray are also seen from time to time. They have tiny air bubbles embedded into the glass, and a widespread myth suggests that one can observe a solar eclipse through such a marble without suffering eye damage, hence the name.

As for the rules, most games in this part of the world will involve two holes 5-6 meters apart, and a triangle of marbles close to one of the holes. The triangle is used because the most common number of players is three. The base of the triangle is usually close to the hole, with the tip pointing to a side. Each player contributes one marble to a tip of the triangle. Then the players stand at the hole and take turns tossing their marbles towards the other hole, without the triangle. There are many allowed and proscribed techniques to do this - "from the knee", "from the air", "from the hand" and so on. Those who manage to land their marbles into the hole without them popping out again enter the next round, tossing the marbles back towards the first hole (the one with the triangle.) The first player who manages to do this gets a chance to hit one of the marbles in the triangle. If he scores a hit, he pockets the "won" marble and continues playing with his original marble. This goes on until all the marbles from the triangle are gone. If he misses, he loses his turn. The trick is to always play (second round) first, in which case the other players theoretically might not even get a chance to play the second round. However there is no universally accepted way to determine who will go first. It often happens that negotiations about this last far longer than the game itself. One way to ensure a degree of fairness is to insist beforehand that the winner must agree to a re-match.

Attempting to pocket the original marble and using the "won" marble to play with, is one of the most common rule-breaking actions. This is done because the original marble is almost always in an inferior position with regard to the other marbles in the triangle. This again depends on the technique used for the "money shot", out of the original hole. One common set of rules stipulates that one hand must be held at the bottom of the hole, with the hand throwing the marble directly above but touching the other hand. Again many players will attempt to cheat by spreading their hands apart slightly to give themselves more options with the marbles in the triangle. Hand position of the player taking the "money shot" is often under strict scrutiny of the other players, who are about to lose their marbles (literally) to him.

Another way of playing is over small drains in the ground, rules vary depending on the type of drain (or manhole cover) but the most common game consists of 2 players and a water drain. The rules are fairly simple, each player takes turns to flick their marble across the drain trying to get it to stop on the same "bar" as the other players marble, if a player succeeds then he/she has won. Almost inevitably this game ends up with someone's marble falling through the drain.

and some kids in Canada play by using a hole. two or three people can play this way. you simply make a shallow or deep hole, you and your friends decide, and everyone takes turns in no particular order to see who can get closer. the closest person gets to go first at flicking the marbles into the hole using the tip of the middle finger or the side of the pointer finger. if the first person misses, the person who was second closest will then go. this will go on until all marbles are knocked in. oddly, the person to knock in the last marble in the hole wins the marbles. no matter what, you play for keeps unless you say so at the beginning of the game. if you say "clearsies", then you take out all of the marbles and keep them safe so you cannot knock them out of the hole. if you say "doctor", then you can get someone else to make the shot for you, but just one shot. if you are playing with "knockies", then you both play the same way, but the person to get closest does not go first--the person who gets furthest goes first. but they must take their turn to move his marble back a little and the first person will try to flick the further marble to the closer one to try and knock it in the hole. after there is one marble left, you will play the last one normally.

A curious version of marbles which used the feet, rather than the hands, to shoot was played in Derry, New Hampshire in the late 1970's. Players first made a target hole, by pivoting on a heel in the dirt. Paired opponents would take turns to see who would get their marble into the hole first, starting from a distance of up to about ten feet. The marble was aimed and propelled (in the case of a right-footed person) by the left foot being placed touching the marble so that the marble was at the outside, widest part of the foot forward of the arch. Then, with that left foot planted, and requiring a bit of a knock-kneed stance, the right foot kicks the inside of the left foot (directly opposite the marble). This blow dislodges the left foot into then hitting the marble into the direction of the hole. The basic strategy was that the first one to sink their marble into the hole won the game, and kept the opponent's marble. A distinct advantage was gained by geting to shoot first. Marbles had a defined value system based on size and style, with very large marbles (termed "Elephant Eggs") being the most valuable, and requiring an equally-valued assortment of marbles to be included in the wager if play was to commence. Due to the two-player nature of the game, and the many players, schoolgrounds sprouted hundreds of holes, with many simultaneous games during recess. Marbles also became a distraction in the classroom, where they often spilled onto the floor from pockets or from slippery admiring hands. These were quickly confiscated by the teaching staff, with no hope of return.

Terms

  • "Goli Gundu" is a Tamil term used to refer to both a game played with marbles, and the marbles themselves.
  • "Keepsies" (or "for keeps") is a variation in which players win the marbles used by their opponent.
  • "Knuckle down", the position adopted at the start line at the beginning of a match.
  • Marbles are also called by their color.
  • Quitsies: Allows any opponent to stop the game without consequence. You can either have "quitsies" (able to quit) or "no quitsies" (unable to quit).
  • A taw or shooter is used to shoot with, and ducks are marbles to be shot at
  • Various names refer to the marbles' size. Any marble larger than the majority may be termed a boulder, masher, popper, shooter, taw, bumbo, bumboozer, bowler, tonk, tronk, godfather. A marble smaller than the majority is a peawee or mini. A grandfather is the largest marble, the size of a pool table ball or tennis ball.
  • Various names for different marble types (regional playground talk {Leicester, UK}): Marleys (Marbles), Prit (white marble), Kong (large marble), King Kong (larger than a Bosser), Steely (Metal Ball-bearing). Names can be combined eg Prit-Kong (Large white marble). There are many more such names as discussed in the next section.

Types of marbles

  • Alley or real - made of marble or alabaster (alley is short for alabaster), streaked with wavy or other patterns with exotic names like corkscrew, spiral, snake, ribbon, onyx, swirl, bumblebee, butterfly, and...
    • Toothpaste - wavy streaks usually with red, blue, black, white, orange
    • Turtle - wavy streaks containing green and yellow
    • Ade - strands of opaque white and color, making lemon-ade, lime-ade, orange-ade, etc.
    • Oxblood - a streaky patch resembling blood
    • Lutz - a type of swirl, taken from the skating term
    • Onionskin - swirled and layered like an onion
    • Clambroth - equally spaced opaque lines on a usually opaque base
    • Cat's Eye or catseye - central eye-shaped colored inserts or cores (injected inside the marble)
      • Devil's Eye - red with yellow eye
      • Beachball - three colors and six vanes
  • Aggie - made of agate (aggie is short for agate) or glass resembling agate, with various patterns like in the alley
  • Mica - glassy to translucent with streaks or patches of mica, ranging from clear to misty
  • Sulphide - clear with an object inside
  • China - glazed porcelain, with various patterns like in the alley
    • Plaster - a form of china that is unglazed
  • Indian - dark and opaque, usually black?
  • Commie or common - made of clay
    • Bennington - clay fired in a kiln with salt glaze
  • Steely - made of steel
  • Croton alley or Jasper - glazed and unglazed china marbled with blue
  • Crystal or clearie or purie - any clear colored glass - including "opals," "glimmers," "bloods," "rubies," etc. These can have any number of descriptive names such as "deep blue sea".
    • Princess - a tinted crystal
    • Galaxy - lots of dots inserted like a sky of stars


Marble collecting

Some historic marbles
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Some historic marbles

Marble collecting is a hobby enjoyed by thousands of people around the world including the respected Larry Farry whose collection, as documented in the Daily Bruin, spans over 1500 unique marbles.[1] As with any collecting hobby a great deal of specialization occurs.

Marbles are categorized by many factors including condition, size, type, manufacturer/artisan, age, style, materials, scarcity, and the existence of original packaging (which is further rated in terms of condition). Each of these ratings is used to calculate the marble's worth, with the final value influenced by overall demand. Ugly, but rare marbles may be valued as much as those of very fine quality.

As with any collectible toy, the value seems to first peak when the collectors with the fondest memories enjoy recalling their childhoods through their acquisitions [citation needed].

Due to a large market, there are many related side businesses that have sprung up such as numerous books and guides, web sites dedicated to live auctions of marbles only, and collector conventions. Additionally, many glass artisans produce marbles for the collectors' market only, with some selling for hundreds of dollars [citation needed].

Manufacture

Glass marbles
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Glass marbles

Marbles are made using many techniques. They can be categorized into two general types: hand-made and machine-made.

Marbles were originally made by hand. Stone or ivory marbles can be fashioned by grinding. Clay, pottery, ceramic, or porcelain marbles can be made by rolling the material into a ball, and then letting dry, or firing, and then can be left natural, painted, or glazed. Glass marbles can be fashioned through the production of glass rods which are stacked together to form the desired pattern, cutting the rod into marble-sized pieces using marble scissors, and rounding the still-maleable glass.

One mechanical technique is dropping globules of molten glass into a groove made by two interlocking parallel screws. As the screws rotate, the marble travels along them, gradually being shaped into a sphere as it cools. Color is added to the main batch glass and/or to additional glass streams that are combined with the main stream in a variety of ways. For example, in the "cat's-eye" style, colored glass vanes are injected into a tranparent main stream. Applying more expensive colored glass to the surface of cheaper transparent or white glass is also a common technique.

Marbles in culture

Video Games:

  • Marble Madness, an Atari game where players race each other to the finish line.
  • Marble Drop, a computer game where players place marbles in a complicated apparatus in an attempt to solve a puzzle.
  • Marble Blast Gold a 2003 'get to the finish' first person game for PC and Xbox.
  • Switchball a 2007 game for PC and Xbox 360.

Other games: (SKITENS), a game played with 2 or more payers. A hole is made in the ground, about 8cm in diameter , Then a line is put down about 4 or 5 meters away you. your enemy trow your marbles at the hole the person that is closest to the hole goes first you must shoot into the hole then you can start shooting at your enemy if you hit their marble you can keep it.

Other Games:

  • Ker-Plunk, a game for two to four players involving marbles.

Hungry Hungry Hippos, a game for 2 to 4 players involving marbles.

External links

References

  1. ^ http://old.dailybruin.com/news/larry_farry_marbles.asp

 
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How Products are Made. How Products are Made. Copyright © 2002 by The Gale Group, Inc. All rights reserved.  Read more
Hacker Slang. The Jargon File. Copyright © 2007.  Read more
WordNet. WordNet 1.7.1 Copyright © 2001 by Princeton University. All rights reserved.  Read more
Wikipedia. This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Marbles" Read more

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