James Cocker (Liverpool): Difference between revisions
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1857 Crocker's wire gauge described in The Engineer <ref>[https://www.gracesguide.co.uk/Special:MemberUsers?file=e/ee/Er18580129.pdf] The Engineer, 29 Jan 1858, p.93</ref> | 1857 Crocker's patent decimal wire gauge described in The Engineer <ref>[https://www.gracesguide.co.uk/Special:MemberUsers?file=e/ee/Er18580129.pdf] The Engineer, 29 Jan 1858, p.93</ref> <ref>[https://www.gracesguide.co.uk/Special:MemberUsers?file=1/14/Er18580416.pdf] The Engineer, 16 April 1858</ref> | ||