61. Science Museum | Huygens' Clocks | Introduction For nearly 300 years, the most accurate clocks in the world all used pendulums,although many improvements were made to Huygens design in that period. http://www.sciencemuseum.org.uk/on-line/huygens/index.asp

search visiting exhibitions online let's talk ... references huygens' clocks Introduction In 1656, Christiaan Huygens built the world's first pendulum clock. It was far more reliable than any previous mechanical timepiece. For nearly 300 years, the most accurate clocks in the world all used pendulums, although many improvements were made to Huygens' design in that period. Christiaan Huygens NMSI Contact Us Support Us ... Site Map

62. H O S T I N G   U K  -  Holding Page English and French antique clocks including skeleton clocks, carriage clocks, antique bracket clocks, tall case clocks,and dial clocks. No online ordering. http://www.bgantiqueclocks.com/

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63. Science Museum | Atomic Clocks | Introduction Modern atomic clocks are even more accurate than Caesium I and time is now The frequencies measured by atomic clocks are much higher than those of a http://www.sciencemuseum.org.uk/on-line/atomclocks/

search visiting exhibitions online let's talk ... references atomic clocks Introduction The first atomic clock, Caesium I, was designed by Louis Essen and built at the National Physical Laboratory in Teddington in 1955. Although it was not the first machine to use atoms for timekeeping, it was the first to keep time better than the best pendulum or quartz clocks. enlarge Louis Essen and Jack Parry using Caesium I It was also the first clock whose timekeeping was significantly more constant than the rotation of the Earth. Modern atomic clocks are even more accurate than Caesium I and time is now defined in terms of atoms rather than the Earth's motion. All mechanical clocks work by counting the vibrations of something which has a constant frequency such as a pendulum. Unfortunately, the frequency of a pendulum is not perfectly constant. It is affected by changes in temperature, air pressure and the strength of gravity. This causes the clock to run too quickly or too slowly. The frequencies measured by atomic clocks are much higher than those of a pendulum but vary much less, so atomic clocks keep time much better. Caesium I was so accurate that it would only gain or lose one second in three hundred years. Modern atomic clocks are even more accurate. It is difficult to imagine that we need to measure time so accurately but it is essential for many aspects of modern life which we take for granted. Modern navigation systems, mobile telephones, digital television and many industrial and commercial activities need this level of accuracy.

64. HC Mingham-Smith Ltd. Can find out what the right time is by accessing Internetbased Atomic clocks, using networked time-servers, GPS (The Global Positioning System), and by listening for time broadcasts over a LAN. http://www.kaska.demon.co.uk/

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65. Decorative Wall Clocks From Ibis Art Handcrafted decorative wall clocks in wood, metal, or acrylic frames featuringSouthwestern, kitchen, children s, nature, and Celtic themes. http://www.ibisart.com/

Wall Clocks with bird, animal, fish, kitchen, children's, modern, Southwest and Celtic themes designed by Ibis Art Our decorative wall clocks are hand crafted in round wood, square metal with glass, and round acrylic styles. Hundreds of wall clocks in Kitchen, Children's, Bird, Animal, Fish, Flower, Celtic, Southwestern Pictogram, Southwestern Pottery, Kokopelli, Celestial Sun and Moon and Santos motifs can be viewed in our secure web store. Each clock is battery operated and guaranteed for quality workmanship and parts. We offer a 15% discount off the regular retail price with shipping to locations in the U.S. and internationally . Gift wrapping and shipping are available on our order form. Turquoise Lizard Metal and Glass Wall Clock Earth Colors Wood Wall Clock ... Kitchen Clocks featuring fruit, rooster, vegetable, garden and cafe motifs. Children's Clocks with angel, Raggedy Ann and Andy, teddy bear, flying pig, Late Rabbit, frog, cat and monkey motifs. Modern Geometric Wall Clocks feature abstract, geometric shapes in bright pastel colors. Southwest Pictogram Wall Clocks including lizard, gecko, turtle, thunderbird and Kachina pictograms.

66. Choose Device Platform Among Palm, Windows Mobile Pocket PC, Symbian UIQ, Series A collection of Palm travel software for world travelers. Features world clocks, autoDST, and currency and clothing size converters. http://www.mobimate.com/worldmate

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67. Educational Exhibits About Time, Clocks, Daylight Saving, And Calendars Links to time exhibits suggested by NIST USNO A Walk through Time, Calendarsthrough the Ages, Daylight Saving Time, Clockworks, Why Files, http://nist.time.gov/exhibits.html

A Walk through Time History of timekeeping from ancient to modern times. (at NIST) Calendars through the Ages Systems of counting the days, months, and years. (at webexhibits.org) Daylight Saving Time When and why do we change our clocks? (at webexhibits.org) ClockWorks Illustrated mechanisms of many historical clocks. (at Britannica) It's About Time Advances in timekeeping accuracy and atomic clocks. (at University of Wisconsin) The Quartz Watch What's inside your wristwatch? See stories and timeline. (at Smithsonian)

68. Www.usbooks.com Books on clocks, watches, watchmakers' tools and related topics. Includes book reviews and price guides. http://www.usbooks.com/

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69. ARTFIELD Manufacturer Of Analogue And LCD Clocks Principally involved in the design, manufacture, and the distribution of a wide range of clocks. A public listed company. http://www.artfield.com.hk/

First Page Introduction News Products Shows ... Customer service User¡G password¡G New user register Forgot password JEWELLERY/MUSIC_BOX REGULATOR ... TROPHY/PLAQUE Founded in 1984 as a Hong Kong manufacturer of analogue and LCD clocks for export market, Artfield today is a sophisticated design and manufacturing group with interests in clock, energy saving light, wooden product, metal trading and electroplating industries and with a world ¡V wide client base. Artfield was founded on a timeless idea ¡V quality. We not only manufacture, but also design and engineer. As a totally integrated company with our specialized design and development team and production facilities, we maintain control over every facet of the manufacturing process. The result is quality you can count on, time and time again. Haven't permit by the owner you can't download arbitrarily ¡Ncopy ¡Npublish ¡Nissue ¡Nsend or use related information for other purpose.about our commoditities purchase E-mail to Info or any E-mail related to this web question : Sardy suggest use800x600 resolving power glance this web

70. Mystical-WWW : Clocks And History Crash course information about the history of clocks. http://www.mystical-www.co.uk/time/clocks.htm

"A brief history of clocks" 'CLOCK GRID' Ancient Calendars Clocks Sun Clocks Water Clocks ... BACK 2 MYSTICAL TIME GRID Our thanks to National Institute of Standards and Technology for the information http://physics.nist.gov/time This page was brought to you by Mystical World Wide Web "http://www.mystical-www.co.uk" Ancient Calendars Historically we have been able to gather only a little knowledge about the methods of time keeping in prehistoric eras, but we do know that in practically every culture just as today, people have been preoccupied with measuring and recording the passage of time. The celestial bodies of the Sun, Moon, Planets and Stars, have allowed ancient civilisations to create systems to provide a measuring of seasons, months, and years. In Europe we have discovered archaeological finds which indicate that over 20,000 years ago scratched lines on sticks and bones, or carefully gouged holes were used as ancient calendars, believed by academics to demonstrate ways of indicating the days between phases of the moon, 'lunar cycles'. Around five thousand years ago, the ancient Sumerians, in the Tigris-Euphrates valley (now in Iraq), had a highly developed system : each year was divided into months;

71. Desperate Enterprises - The Leading Manufacturer Of Nostalgic Decor And Collecta Home decor and collectables including tin signs, light switch plates, refrigerator magnets, clocks, neon signs, antiques, and calendars. http://www.desperate.com/

INFORMATION NEW PRODUCTS FREE CATALOG COMING SOON ABOUT US ... CANVAS PRINTS NEW PRODUCT DISPLAYS SHOPPING CART VIEW CART CHECK OUT EXPRESS ORDER SUPER EXPRESS SERVICE DEPT. ORDER STATUS QUESTIONS CONTACT US Welcome to Desperate.com! The Leading Producer of Nostalgic Decor CHECK OUT OUR COMING SOON SECTION! OVER 600 IMAGES TO CHOOSE FROM! WEBSITE NAVIGATION TIPS FREE SHIPPING ONLINE ORDER TRACKING VISA - MASTERCARD - AMEX - DISCOVER SELECT A PRODUCT LINE TO THE LEFT ORDERS SENT WITHIN 1 TO 3 BUSINESS DAYS Browse Our Online Catalog Page by Page or Click Here to Request Catalog We Ship Internationally Dealers! Wholesale pricing Available!

72. Antique Clock Pictures At Barrie's Virtual Clock Museum Pictures and information on over 300 antique and vintage clocks in Barrie s ClockMuseum. http://www.clock-museum.co.uk/

Master clocks and electric clocks a special interest. Wall, mantel, grandfather (aka tallcase or longcase), table, shelf, bracket, carriage, marble, ships, desk, novelty, oddments of horological interest and time recorders. Site map for spiders There is a separate list of clocks for sale on this website click here for List Please do not enquire about clocks in the museum, they are NOT for sale. Listing of clocks sorted by makers name with historical details of many makers. Listing of clocks sorted into types eg wall clocks, table clocks etc. Clocks in the 20th century Link to Smiths-Clocks.co.uk, Smiths history and pictures etc.. Links to other clock sites Anything in Blue is a clickable link.Use your browser's back button to get back. To contact me click EMail Free counter Last update 22nd August 2005 Hold mouse here for notes on the most recent changes. Barrie's virtual Museum of Clocks.

73. Chess Sets, Clocks, Books, Bags, And Boards At Wholesale Prices Equipment and supplies such as clocks, sets, boards, and pieces. http://www.chessineducation.com/

Home Contact Us Clocks Books ... Local Scholastic Events Wholesale Chess Equipment Your source for chess pieces, chessboards, demonstration boards, clocks and timers, chess bags, chess books for schools and clubs, chess T shirts, and more! The price list and ordering information is on the DISCOUNT page. Our New T-Shirt Designs are here! check them out: Call me at 817-819-7995 for quotes, orders, and info. Don't forget to donate to the Katrina Relief Effort!! Chess Pieces Chess Boards Chess Clocks Carry Bags ... web design by d

74. Clocks The first real means of telling time with clocks appear to have been devised by the They used sundials or shadow clocks to measure the time of day. http://www.crystalinks.com/clocks.html

The earliest measurements of time date back over 10,000 years. One of the key drivers of inventing methods of keeping track of time were the farmers needs to determine the best time to plant. Archaeologists have discovered bones with inscriptions that are believed to have been used to track lunar cycles. The first real means of telling time with clocks appear to have been devised by the Egyptians. By 2100 BC, they had invented a means to divide the day into 24 hours. They used sundials or shadow clocks to measure the time of day. The Sundial indicates the time of day by the positioning of the shadow of some object on which the sun's rays fall. The shadow clock consists of a straight base with a raised crosspiece at one end. A scale with time divisions is inscribed on the base. The clock is set east-west and is reversed at midday. Sundials were another early method for marking time. One of the first ancient people to use sundials were the Sumerians. They divided the day into 12 parts and each part was about 2 hours long. They measured the length of shadows to determine how much time had passed. No one is really sure why the Sumerians kept track of time; maybe it was for religious purposes. Sundials were dependent on the weather; it would be useless on a cloudy day and the winter and summer shadows would not correspond with the markings. In order for the sundial to work correctly, it had to be positioned correctly. The Egyptians also divided the day into 12 parts as well. They used huge granite columns called Cleopatra Needles to keep track of time periods. They had 12 marks on the ground that equalled 12 parts of the day. When the sun touched the top, a shadow was created and the length and position of the shadow told the Egyptians how much daylight remained. They invented a portable piece called a sundial. It contains 3 parts: a circular dial, a needle and a style (gnomon) to keep the needle in place. Cleopatra's needles were inconvient and impractical for the average person.

75. Time Clocks From AlliedTime: Electronic And Computerized Time Clocks, Biometric Offers quantity prices on computerized time clocks payroll recorders for small businesses. http://www.alliedtime.com/

One-Stop shopping for employee time clocks, time clock systems, and time clock supplies Employee time clocks and time recording systems Phone(386)409-7026 Fax(386)409-7027 E-mail: sales@alliedtime.com $$SAVE$$ here on Ribbons ... and other brands. SITE INDEX Registered Users Login to Reorder Time Clock Categories PC-Punch Time Clocks Badge/Pin-Entry Systems TCP/Ethernet Time Clocks Time-Computing Time Clocks ... Signal Devices Time Clocks Supplies Time Clock Ribbons Time Card Racks Customer Service Warranties/Returns Support for Amano Clocks Support for Acroprint Clocks September Specials: Icon Pin-Entry 50-Employee Time Clock System Monthly Special! List Price: $829.00 Sales Price: Icon PROX+ TCP/Ethernet-Ready Time Clock System September Only! List Price: $1,442.00 Sales Price: PC-Punch Attendance System 50-100 Employees September Only! List Price: $125.00 Sales Price: Acroprint TimeQPlus 120-Employee Time Clock System 2-Free Cleaning Cards List Price: $699.00 Sales Price: HP-1000 Hand Reader 50-Employee Biometric System List Price: $1,900.00 Sales Price: HP-50E Hand Reader Ethernet Ready 50-Employee System List Price: $2015.00

76. Antique Clocks, Fine Horology And Collection Antique clocks, sale and restoration by a Swiss clockmaker. On display are wallclocks, mantel clocks, equipment, examples of restoration work, http://www.pendulantic.com/

antique clocks, sale and restoration Neuchatel, Switzerland Swiss and French clock Antique Clocks - Pendulantic Cliquez svpl. If you are looking for antique clocks, or a collectors' clock If you need a clockmaker an estimate, or to buy or have restored an old clock If you appreciate horology, or, more particularly, antique clock Visit: Antique clocks for sale + inscription mailing list Recent arrival The Pendulantic company, our address and phone Exemple of restoration work Portrait of the craftsman ... Treasure Trove! New Rolex Cosmograph Daytona (clocks, equipment, books, workbench etc.) Pivot Polishing-no problem ! ROLLIMAT Neuchatel Clocks Le Castel Tools ... Archives, (sold clocks) e-mail !!!Links with other sites!!! NEW ! Our Guestbook Last update: September 10th, 2005 Old clocks are a field of horological collecting where a knowledge of case styles is as important as knowing about the mechanical details at the heart of these beautiful works of art. French clocks, particularly the clocks called cartels in France (wall clocks on matching brackets), are a speciality of the Maison Pendulantic. We are also official distributors of the The Rollimat Pivot Polishing Machine. We try always to be able to offer our clients important examples of the following sorts of antique clock: French antique clocks : Let me encourage you to check our site quite often as some clocks are sold or exchanged very rapidly.

77. Black Barn Clocks Fine longcase and wall clocks made using traditional techniques. http://blackbarnclocks.co.uk

78. The History Of Clocks This page tells what you the history of clocks. The history of clocks is verylong, and there have been many different types of clocks over the http://www.arcytech.org/java/clock/clock_history.html

The History of Clocks The history of clocks is very long, and there have been many different types of clocks over the centuries. Not all historians agree on the history of the clock. The word clock was first used in the 14th century (about 700 years ago). It comes from the word for bell in Latin ("clocca"). Using the Sun The first way that people could tell the time was by looking at the sun as it crossed the sky. When the sun was directly overhead in the sky, it was the middle of the day, or noon. When the sun was close to the horizon, it was either early morning (sunrise) or early evening (sunset). Telling the time was not very accurate. Sundial Clocks The oldest type of clock is a sundial clock, also called a sun clock. They were first used around 3,500 B.C. (about 5,500 years ago). Sundials use the sun to tell the time. The shadow of the sun points to a number on a circular disk that shows you the time. In the big picture below on the right, the shadow created by the sun points to 9, so it is nine o'clock. Since sundials depend on the sun, they can only be used to tell the time during the day.

79. Brundlefly UK: Home Page Produces standard and custom chess sets, boards and tables, also clocks, wooden candle holders and tabletop turntables in Derbyshire, UK. http://www.brundleflyuk.com/

Brundlefly UK, Cromford Road Industrial Estate, Langley Mill, Notts, England, NG16 4FL. Tel: 01773 762400 Fax: 01773 711920 Email: info@brundleflyuk.com range Brundlefly was established in 1996 as a UK designer-manufacturer and supplier of quality unique accessories in wood to the furniture and gift trades, finished in a range of colours and finishes, but our designer has over 20 years experience in this field. Based in Nottinghamshire, it has at its disposal a modern workshop, including CNC equipment, along with up to date paint spraying facilities. Brundlefly is unique in that it does not only manufacture its own range of products but can produce to the customer's own requirements (subject to certain conditions) thus offering exclusivity. We have strived to manufacture our products from environmentally friendly sources - thus most of the material that we use is pine wood from Europe.

80. French Antique Clocks http://www.hor.ology.org.uk/

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