Most quality pieces of antique furniture will have a dovetail joint in the drawer construction as it was a very early form of construction, but was so successful, it was used for many s of years. The Dovetail joint, got its name because of its similarity to the shape of a birds tail. The Dovetail joint is a highly skilled bit of cabinet making and is extremely strong and interlocks securely to connect two pieces of wood, usually drawer fronts and sides, or corners on chest carcasses. Originally they were done by hand, cut using a small saw and chisel, stuck using animal glue. This method can be seen as far back as the Egyptian times found on the furniture entombed with mummies, in pyramids and in furniture built for Chinese emperors.
Opinion you scientific instrument used for carbon dating that would
Radiocarbon dating also referred to as carbon dating or carbon dating is a method for determining the age of an object containing organic material by using the properties of radiocarbon , a radioactive isotope of carbon. The method was developed in the late s by Willard Libby , who received the Nobel Prize in Chemistry for his work in It is based on the fact that radiocarbon 14 C is constantly being created in the atmosphere by the interaction of cosmic rays with atmospheric nitrogen. The resulting 14 C combines with atmospheric oxygen to form radioactive carbon dioxide , which is incorporated into plants by photosynthesis ; animals then acquire 14 C by eating the plants. When the animal or plant dies, it stops exchanging carbon with its environment, and from that point onwards the amount of 14 C it contains begins to decrease as the 14 C undergoes radioactive decay. Measuring the amount of 14 C in a sample from a dead plant or animal such as a piece of wood or a fragment of bone provides information that can be used to calculate when the animal or plant died. The older a sample is, the less 14 C there is to be detected, and because the half-life of 14 C the period of time after which half of a given sample will have decayed is about 5, years, the oldest dates that can be reliably measured by this process date to around 50, years ago, although special preparation methods occasionally permit accurate analysis of older samples.
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