Unique Slide Rule Company Dating a slide rule becomes difficult if a manufacturer did not imprinting a date code or serial number on the stock. Even then, some manufacturers recycled their serial numbers over time, and the stock could have been left on a shelf for a period of time before the slide rule was assembled and shipped. Catalogs are an excellent indication of when a model was produced or discontinued. Sometimes the copyright date in a manual is used to determine the approximate age, but one printing could span several decades. Dates that a design was registered or patented only suggests an approximate year a model may have been first produced, as the model may have been distributed a year or more before issuance patent pending. The patent may only refer to a certain combination of scales used over a thirty year time on different models. Having contact with the original owner of a slide rule that remembers the year it was purchased helps on determining the age. Other Slide Rule dates are currently in development. Assistance in this effort will be appreciated. Please refer to the museum library and individual galleries as this page is being built.
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Outlook Other Abstract U-Pb radioisotope dating is now the absolute dating method of first choice among geochronologists, especially using the mineral zircon. A variety of analytical instruments have also now been developed using different micro-sampling techniques coupled with mass spectrometers, thus enabling wide usage of U-Pb radioisotope dating. However, problems remain in the interpretation of the measured Pb isotopic ratios to transform them into ages.
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Note that this implies the passage of several wheel-less millennia even after the invention of agriculture and of pottery , during the Aceramic Neolithic BCE. Chalcolithic , invention of the potter’s wheel ; earliest wooden wheels disks with a hole for the axle ; earliest wheeled vehicles, domestication of the horse — BCE: Middle Bronze Age , invention of the spoked wheel and the chariot A depiction of an onager -drawn cart on the Sumerian “battle standard of Ur ” c.
These were made of stone or clay and secured to the ground with a peg in the center, but required significant effort to turn. True freely-spinning potter’s wheels were apparently in use in Mesopotamia by BCE and possibly as early as BCE,  and the oldest surviving example, which was found in Ur modern day Iraq , dates to approximately BCE.
Are they somthing else? Thanks Discount Fiestaware – 26th Nov, 09 There is old and new Fiesta that have no stamp at all, such as the gusto bowls. It can be tough to date Fiesta with no markings — it all ces down to identifying the color and determining if that particular piece was produced by HLC. Tell us more about your Fiesta Karlie – 27th Nov, 09 That was very informative, and know i am looking in my cupboards to see how old my new fiesta is Jane Schenck – 2nd Jan, 10 The newer ones have the ink stamp.
But one piece, a covered butter dish only has a rather crude Fiesta molded into the bottom, the E in fiesta looks like uppercase, but only the E, and in another area at the side of the bottom of the dish is a small white C. It is in a rose color. I read somewhere about fake butter dishes. My gut says this is a fake but then I wonder if it is rare?
I have 64 pieces and this is the only one that looks strange.
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Share this article Share Brocken spectres get their name from the Brocken, a peak in the Harz mountain range in Germany where the phenomenon was first identified, and where it is particularly common due to the frequent fogs there – and the popularity of the region among hikers. It can only occur when the sun is directly behind the observer’s back, and when the fog behind them is thick enough and contains enough water droplets to make the effect visible.
Diffracted light in the mist and a low sun formed the essential conditions for the optical illusion to occur Stunned:
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The beginning of carpet weaving remains unknown, as carpets are subject to use, deterioration, and destruction by insects and rodents. There is little archaeological evidence to support any theory about the origin of the pile-woven carpet. The earliest surviving carpet fragments are spread over a wide geographic area, and a long time span. The technique of weaving carpets further developed into a technique known as extra-weft wrapping weaving, a technique which produces soumak , and loop woven textiles.
Loop weaving is done by pulling the weft strings over a gauge rod, creating loops of thread facing the weaver. The rod is then either removed, leaving the loops closed, or the loops are cut over the protecting rod, resulting in a rug very similar to a genuine pile rug. It seems likely that knotted-pile carpets have been produced by people who were already familiar with extra-weft wrapping techniques.
It would be good if 5 women who weave carpets  were staying with her. It is unknown whether these were flatweaves or pile weaves, as no detailed technical information is provided in the texts. Already the earliest known written sources refer to carpets as gifts given to, or required from, high-ranking persons. The first surviving pile rug[ edit ] The oldest known hand knotted rug which is nearly completely preserved, and can, therefore, be fully evaluated in every technical and design aspect is the Pazyryk carpet , dated to the 5th century BC.
It was discovered in the late s by the Russian archeologist Sergei Rudenko and his team.
Problems with the U-Pb Radioisotope Dating Methods—1. Common Pb
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Primary source references As a preface to this document, I want to point out that it is a shame that we have to continue to refute the same arguments that evolutionists keep bringing up over and over again in their attempts to argue against the fact of creation, which fact has been well established since the day the earth was created ex nihilo several thousand years ago. It is also a shame that the masses have bought all this based on some circular reasoning about fossils, where fossils tend to be found buried, similarities between various life forms, the presence of certain decay products in rocks, and other inherently speculative arguments about the past, based on phenomena that exist in the present.
If I hope to accomplish anything, it will be to simply encourage critical thinking. One must get past the arguments ad populum that its popularity counts for something , ad hominem that if you attack the person making the argument, this counts for something , and especially ad baculum that there are people who have the clout to decree it as true , to ask the key questions and challenge the unsubstantiated assumptions and thinking of those who would hold to the evolution position.
Today there are an increasing number of anti-creationist authors who are producing books and periodicals that make this relatively brief presentation insufficient to deal with all the points in dispute. Those defending creation today who don’t have the time to devote their life’s study to gaining expertise in all fields of inquiry must principally be prepared to think critically, logically, and challenge unsubstantiated assumptions made by these people.
They must also keep a level head in the face of some vicious attacks and diatribes that will be directed against them, as is advised in the scriptures 1 Peter 3: By way of definitions, I want to point out that when I speak of “evolution,” I am referring to the popular contemporary use of the word, which in a nutshell is the belief that all life forms are related by ancestry, and that the first life form occurred spontaneously, all due to completely natural processes. When I speak of “creation,” I am referring to the inherently obvious fact that the origin of all life forms can be attributed to a creator who purposefully created them with planning and intent, and the documented fact that this occurred over the course of a week’s time several thousand years ago.
This document is not a scientific thesis, but an apologetic intended to be submitted and defended by me in an interactive, online electronic forum. I claim no copyright on this document, and grant its use to the public domain. I have not written it with a view towards receiving any sort of financial or other personal gain, and I request that others utilizing this document do likewise. Those copying and disseminating this document shall assume full responsibility for defending it.
I do not agree to defend this document in any forum that I did not submit it, due to the practical limitations of my own time.
How accurate are Carbon-14 and other radioactive dating methods?
Town has been captured Grassy crown: Town has been relieved Rostral crown: Naval victory Vallary crown: This method is the one least frequently employed, although it was used quite widely in the Netherlands during the 17th century. Here the medal is made by hammering a thin shell of a metal blank into a hollow die on which the artist has made a design. The obverse and reverse of the medals, which are made separately, are then soldered together, the resulting medal being hollow.
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See this page in: Hungarian , Russian , Spanish People who ask about carbon 14C dating usually want to know about the radiometric  dating methods that are claimed to give millions and billions of years—carbon dating can only give thousands of years. People wonder how millions of years could be squeezed into the biblical account of history. Clearly, such huge time periods cannot be fitted into the Bible without compromising what the Bible says about the goodness of God and the origin of sin, death and suffering —the reason Jesus came into the world See Six Days?
Christians , by definition, take the statements of Jesus Christ seriously. This only makes sense with a time-line beginning with the creation week thousands of years ago. It makes no sense at all if man appeared at the end of billions of years. We will deal with carbon dating first and then with the other dating methods.
How the carbon clock works Carbon has unique properties that are essential for life on Earth. One rare form has atoms that are 14 times as heavy as hydrogen atoms:
How accurate are Carbon-14 and other radioactive dating methods?
Early Items From H. Howe’s Historical Collections of Ohio Art. By a Citizen of the United States. The earth is nearly eight thousand miles in diameter, and the deepest excavations that have been made in it by human art, do not extend to half a mile below its surface. We are, therefore, utterly ignorant of the nature and composition of the interior of this immense mass, and must, perhaps, for ever remain so. The subject is of too much interest, however, not to have excited the particular attention of philosophers, and, in the absence of facts, many of them have not hesitated to resort to speculation and conjecture.
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This implies the passage of several wheel-less millennia even after the invention of agriculture and of pottery , during the Aceramic Neolithic. Copper Age , invention of the potter’s wheel ; earliest wooden wheels disks with a hole for the axle ; earliest wheeled vehicles, domestication of the horse — BCE: Middle Bronze Age , invention of the spoked wheel and the chariot A depiction of an onager -drawn cart on the Sumerian “battle standard of Ur ” c. These were made of stone or clay and secured to the ground with a peg in the center, but required significant effort to turn.
True freely-spinning potter’s wheels were apparently in use in Mesopotamia by BCE and possibly as early as BCE,  and the oldest surviving example, which was found in Ur modern day Iraq , dates to approximately BCE. The earliest well-dated depiction of a wheeled vehicle here a wagon — four wheels, two axles is on the Bronocice pot , a c. This barn was 40 m long with 3 doors. They both are dated to c. The specimen, dating from 1, — years BCE , represents the most complete and earliest of its type found in Britain.
The wheel’s hub is also present. A horse’s spine found nearby suggests the wheel may have been part of a horse-drawn cart. The wheel was found in a settlement built on stilts over wetland, indicating that the settlement had some sort of link to dry land. Nubians from after about BCE used wheels for spinning pottery and as water wheels.
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How to ace your first date In our series of articles on dating, relationships, love and sex, we round up the top disability dating sites so you can find that special someone, or a great friendship. Although we first published this article in , we have updated it in with the latest information and latest disability dating sites. With the online dating industry now worth billions, the market has expanded rapidly to try and meet the needs of everyone who is looking for love.
From uniform dating to websites that cater specifically for tall people, or those with a gluten intolerance, there really is a site out there for everyone. So what do websites that are aimed specifically at disabled people offer, and who is using them? Disabled Dating 4U Disabled Dating 4U started in the UK back in as a small site, but has since grown in popularity and claims to have thousands of new members joining it each day. It has now launched in the US as well, so members can view profiles from people in both countries.
There are three different levels of membership to the site — free trial, gold and VIP. Members on a trial can view profiles and send a limited number of messages, while those at the other end of the scale with VIP membership have priority listing on the site and are featured on the homepage. Dating4Disabled Founded in , Dating4Disabled is a global website with the express aim of bringing disabled people together across forums, blogs and chat rooms. Designed for use by disabled people only, the site tries to create an inclusive atmosphere in which people feel safe to express themselves.
Meet Disabled Singles Meet Disabled Singles claims to be the fasting growing co-operative of online dating sites in the world. This essentially means that it is part of a collection of dating sites, so if you sign up, your profile will automatically be visible to a larger audience via other relevant dating websites, not just Meet Disabled Singles.