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As Churchill noted, To improve is to change, to be perfect is to change often.The ancient Egyptians and Romans used organic glue for wood furniture, especially with decorative veneer techniques, but like much advanced technology, glue for wood became a lost art after the collapse of Rome in 476 until the Renaissance, around 1400, when glue and veneer techniques reappeared.

By examining production figures for wire nails, a model is generated for dating sites built of machine cut nails.Then the nail maker would insert the hot nail into a hole in a nail header or anvil and with four glancing blows of the hammer would form the rosehead (a shallow pyramid shape).This shape of nail had the benefit of four sharp edges on the shank which cut deep into timber and the tapered shank provided friction down its full length.This model is then examined using data from dozens of sites in the USA and Canada.Just as important, the model provides clues to recycling activity and access to different manufacturing sources.Nails in antique furniture are often barely noticeable, but they are another key to unlock the history of wooden pieces.