24. Barnes (Franklin George) Protective Means for Ships against Mines, an Torpedo attack, Provisional Patent 532,795, folding lithographed plate, disbound, small folio, 1941.
est. £200 – £300
In 1939 Franklin Barnes of Scoresby, Victoria applied for a Protective Means for Ships Against Mines, and Torpedo Attack. This is the degaussing method which makes ships non-magnetic. Just in time for World War II.
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