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index.htm%23wheatstone-patent-1829
index.htm%23wheatstone-patent-1829
http://www.concertina.com/patents/index.htm%23wheatstone-patent-1829
1829 in science
Link from a Wikipage to an external page
index.htm%23wheatstone-patent-1829
http://www.concertina.com/patents/index.htm%23wheatstone-patent-1829