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locks and keys
how do you date old locks and keys
Answers
Without going back to ancient times, this article covers the development of the 'modern' lock and key:
http:// science. jrank. org/ pages/ 3990/ Lock- Key- M odern- locks. html
18:55 Thu 13th Aug 2009
Without going back to ancient times, this article covers the development of the 'modern' lock and key:
http://science.jrank.org/pages/3990/Lock-Key-M odern-locks.html
http://science.jrank.org/pages/3990/Lock-Key-M odern-locks.html
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