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Saturday, July 14, 2012
Sunday, April 29, 2012
How Do You Know the Age of a Stone Arrowhead?
When you find an arrowhead, or someone shows you an arrowhead, how can you tell how old it is?
A lot of the answer for how old an arrowhead is depends upon the type of stone the point in question is made from. Old flint tends to get coarser and turn lighter colors, towards white even, if it is exposed to sunlight and air and rain and freezing over time. However, if it is buried, sometimes there is very little apparent aging, unless the soil itself is chemically acting on the surface of the flint. I have found buried points and blades, which, after I washed them, were almost as smooth and unchanged as new materials. So, you then look for deposits of minerals from the buried condition. Also, if flint has been exposed to the atmosphere, often the exposed side of a flint point is quite discolored relative to the unexposed side. This is a good indication of age.
Refurbish
If the point is obsidian, especially in a desert area, and it has been exposed on the surface of the ground, the exposed side many times is somewhat polished by wind and blowing dust or sand. The underside is more original in feel, or it is often coated with chemical deposits from the soil. In addition, in desert or normal weather pattern areas, obsidian is affected by rain and other moisture over time, and gets what is called a "hydration rind" on the outer surface. This tends to dull the originally shiny, slick appearance of the flaked stone. It makes an outer layer of changed material, due to the absorption of minute amounts of water, that is thicker depending on the length of time of the exposure to the elements. Archaeologists have even taken to calibrating the age of obsidian points or tools based on the thickness of the hydration rind in a known area. This is done by comparing a sequence of rind measurements to ages determined by other accepted dating methods, C14, tree rings, etc., to set up a scale to get a rough age for a piece based on the thickness of the rind. The rind thickness can be observed by cutting a slice through an expendable obsidian tool.
How Do You Know the Age of a Stone Arrowhead?
Yet additional indicators of possible age are the style, size and source location of a point. Many styles of points were unique to certain time periods, which enables the observer to position the point in a time sequence. Also, many specific styles were used in specific regions, which also helps to identify the cultural identity of a particular piece. And, the material from which a particular regional style of point is made is generally known, at least to experienced collectors. So, when a point made of an abnormal, atypical material for a particular style is exhibited, the likelihood of modern production increases.
These concepts are just the beginning of the discussion of determining the age of an arrowhead.
Artifact authenticators also examine the edges of the points under high magnification to observe natural aging and "use wear" patterns vs. chemical aging or mechanical wear and tear with metal or other modern materials.
Mixed, confused or varying chipping and flaking styles indicate possible reworking of a point, either in ancient times to refurbish the edge or tip of the point for re-use, or in modern times to reshape it into an apparently complete tool.
Additional analytical methods come into play after an examination of the consistency and style of flaking patterns on a point or tool.
Authenticators can observe knapped stone surfaces under special light to see the potential difference in the age of the visible surfaces. Old surfaces and new surfaces react differently to certain kinds of light, and are visibly different to the eye under that special light. This difference between old and new stone surfaces also enables the detection of potentially modern rechipping of old points to reshape them.
This information can help collectors to make sure of what they are purchasing or acquiring by trade. And it will help identify the native culture and time period of the pieces which they find, in the field or through the various connections which are available, such as the internet and regional artifact shows.
How Do You Know the Age of a Stone Arrowhead?
F. Scott Crawford is the editor and publisher of the monthly e-magazine "Arrowhead Collecting On The Web". "Arrowhead Collecting On The Web" provides an on-going series of articles and graphic presentations of information related to the many different aspects of finding and learning about the relics of previous cultures which remain to be found today. With a special focus on internet based resources for finding and collecting and understanding authentic ancient artifacts such as arrowheads. The editorial objective of "Arrowhead Collecting On The Web" is to help readers become long-term, even serious collectors of arrowheads, over the years to come. Subscription information for this unique monthly e-magazine is available at http://www.ArrowheadCollectingOnTheWeb.com/ACOTW-Subscription-Info.html For more information click on this link: Arrowhead Collecting On The Web
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What Credit Score Do I Need to Buy a House?
With so much talk about the credit crunch and so called sub prime if you are wanting to buy a house your credit score has never been so important.
As a direct result of the credit squeeze, mortgage lenders have had to tighten their lending criteria significantly meaning that they now are paying much more attention to a the credit scores of borrowers before issuing home loans.
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What credit score do I need to buy a house?
What Credit Score Do I Need to Buy a House?
It is hard to say exactly. Much will depend on the specific lender in question as well as the amount of finance you need and the size of you down payment or deposit. What is certain is that the better the credit score the easier you will find it to get finance. In addition a better credit score will also mean you will be able to get cheaper finance on your home loan, meaning you monthly repayments will be minimized.
The average credit score in America is about 690. If you have a score higher than this then you should have no problems landing a competitive mortgage deal. If you have a credit score of lower than this then you will most likely still be able to find finance but it will be more expensive with a higher interest rate. If this is the case it is crucial you try to improve your credit score.
Ways to raise you credit score
# 1 The first and most obvious step is to try to ensure you pay all of your bills on time This should help prevent your score deteriorating anymore and over time will help it rise. Ensure you do not miss any monthly payments.
# 2 If you have any surplus income consider overpaying some of your debts. Start with the most expensive (the ones with the highest rates of interest). Over paying debts will improve the ratio between the amount of debt you have and your credit limits. Improving this ratio will greatly improve your credit score.
# Try to avoid any unnecessary debts. Buying a home is a big financial commitment. Be sure to wait until you have moved in and found the mortgage repayments are affordable before taking on any other additional debts.
What Credit Score Do I Need to Buy a House?
For further information regarding methods to increase your credit score or getting finance with bad credit click here.
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Friday, April 27, 2012
How to Build a Drag-Racing Car
Drag racing is a kind of car racing competition. The first one that will cross a set of finish lines is the winner. This has been a sport that has first been introduced in the US some time after the second World War but become widely famous since then.
There are specific cars specifically made for drag racing but you can build your own. There are some people that refurbish old sports car models to make them worth entering in this competition. Here is how you can build your very own drag racing type of car:
Refurbish
Step 1: Remember that in this kind of car, you need speed and power and aggressiveness. With the speed that comes with the car, if your car cannot round curves efficiently, it can skid off the track. Make sure that you modify the suspension system of your car. It lessens raising movements when you accelerate on it. If you apply high torque to the car, the car reacts by raising its front end and leaning on one side which will make you lose your stability.
How to Build a Drag-Racing Car
Step 2: Choose the right tires. Since you are competing, you need to choose the most durable tires. You cannot afford pinch flats or puncture flats during this time. Choose those with better grip and stickiness as some roads tend to be a little slippery. Experts prefer tires with racing slicks as this has better surface grip. Also, this will help you accelerate faster and gain momentum.
Step 3: You have to be equipped with the right protective gears. Your car has to be equipped with a fire extinguisher in case the engine goes into flames. A helmet should also be at the ready and also special racing goggles for your protection. Your car should also be equipped with air bags for worse case accidents. It is also a must to have a roll cage installed as this will protect you just in case your car flips and rolls over.
Step 4: One trick to winning the race is to concoct your very own fuel mixture. This is one of the secrets of drag racers. The combine all sorts of gasoline, especially the high octane ones with the bolstering powers of nitrous oxide and many other fuel-type of substances such as methanol. You can ask the help of an expert in the right mixing of these substances as it can be dangerous if you experiment on your own.
How to Build a Drag-Racing Car
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Tuesday, April 24, 2012
Is Silver a Good Investment Right Now?
Even though gold price ranges have reached an all-time high, it is silver now which is fast becoming the hottest commodity to invest in. There are numerous ways to purchase silver. One such method for a novice or even experienced buyer would be to acquire true silver bullion bars and coins. Of course you'll have to have a place at home to keep them or you can keep them in your safe deposit box. An alternative way to buy silver is to buy old silver coins, however, investing in old silver coins can be a little more complicated than investing in new U.S. mint coins and bars. You can then hang on to your bars and coins for a couple of years awaiting the predicted exponential rise in the value of silver.
If you are going to buy Bullion your main objective should be the price in relation to the actual silver base rate at the time. There are lots of costs involved in the process of making silver bullion, especially with minting and logistics. Expect to pay a 20% premium on a small amount of silver. The price of silver bullion bars is extremely reasonable right now, especially knowing that this precious metal is a commodity. Buying rare coins and bullion is one of the best ways to add to your investment portfolio. Just be sure buy from a reputable dealer best dealer, one of which is APMEX, the #1 online precious metals dealers in the world. Yes, silver is not only a good, but a smart investment right now and APMEX has lots of coins and bullion to consider.
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Is Silver a Good Investment Right Now?
Is Silver a Good Investment Right Now?
Gold and Silver
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