John Armstrong (of Sunderland): Difference between revisions
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1858 Invented an apparatus for treating timber for preservation. | |||
1863 John Armstrong, Timber Preserving Works and Saw Mills, Sunderland.<ref> [[1863 Institution of Mechanical Engineers]] </ref> | 1863 John Armstrong, Timber Preserving Works and Saw Mills, Sunderland.<ref> [[1863 Institution of Mechanical Engineers]] </ref> | ||
Revision as of 18:03, 1 February 2017
1858 Invented an apparatus for treating timber for preservation.
1863 John Armstrong, Timber Preserving Works and Saw Mills, Sunderland.[1]
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