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Our aim is to find out whether there is any difference between the δN of bone collagen isolated from relatively well-preserved bones using the two methods.Our sample set consists of 5 modern and 47 archaeological animal and human bones from the southern and western parts of South Africa.After removing all the known gases from air, he found gas remaining that occupied one-eightieth of the original volume. Rayleigh and Ramsay wrote a joint paper in 1895 notifying the world of their discovery.The new gas wouldn’t react with anything, so they named it argon, from the Greek ‘argos’, meaning inactive or lazy.

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As a result of its unreactiveness, argon is used in light bulbs to protect the filament and to provide an unreactive atmosphere in the vicinity of welding.It is also used in the semi-conductor industry to provide an inert atmosphere for silicon and germanium crystal growth.Argon is used in medical lasers, in ophthalmology for example to correct eye defects such as blood vessel leakage, retinal detachment, glaucoma and macular degeneration. Argon is produced commercially by fractional distillation of liquefied air with (for high purity argon) catalytic burning of left over traces of oxygen.He aimed to find out if ALL of the air that was not oxygen or carbon dioxide could be converted to nitrous acid.If it could, he would know that air was entirely oxygen, carbon dioxide and nitrogen.

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