The National Park Service in its historic structures restoration program has developed some research techniques...
The History of Nail Making History does not record who it was, but the incredible results of that inspirational moment are all around us - in the houses we live in, the bridges we cross, the furniture we sit on...
Thats not necessarily true. Nails used to be valuable objects. Unused buildings were often dismantled to re-use the parts. Nails were removed and re-used.