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M ermaid and Wreck R eef shipwreck objects

M ermaid and Wreck R eef shipwreck objects. p ulley sheath on the seafloor, Mermaid wreck site http://silentworldfoundation.org.au/mermaid.html. Silentworld Foundation. One of Silentworld’s research vessels at anchor in the Pacific Islands

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M ermaid and Wreck R eef shipwreck objects

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  1. Mermaid and Wreck Reef shipwreck objects pulley sheath on the seafloor, Mermaid wreck site http://silentworldfoundation.org.au/mermaid.html

  2. Silentworld Foundation One of Silentworld’s research vessels at anchor in the Pacific Islands http://silentworldfoundation.org.au/other-expeditions.html Foundation objectives

  3. http://silentworldfoundation.org.au/wreck-reef.html • Wreck Reef expedition • Team members

  4. Wreck Reef http://en.wikipedia.org/wiki/Wreck_Reefs Location 1803 wrecks of Porpoise and Cato Wreck Reef

  5. Wreck Reef Expedition objectives Four wrecks: Cato, HMS Porpoise, Mahaica, Anne expedition team off Porpoise Cay http://anmm.wordpress.com/category/maritime-archaeology/wreck-reefs-expedition/ anchor from the wreck of the Porpoise on the sea floor http://anmm.wordpress.com/category/maritime-archaeology/wreck-reefs-expedition/

  6. Mermaid Location 1826 wreck of HMCS Mermaid Surveying the wreck of Mermaid http://silentworldfoundation.org.au/mermaid.html Frankland Islands

  7. Objects http://silentworldfoundation.org.au/wreck-reef.html

  8. Bilge pump housing Handmade bricks joined by mortar Copper sheathing Copper alloy drawer handles Block of coal Canister shot Lead shot ball Glass shards

  9. Desalination baths for copper, glass and ceramic copper glass ceramic • Copper in 2.5% w/v sodium sesquicarbonate solutions • Ceramics and glass in deionised water only

  10. Coal and lead in long term storage • Not treated • Documentation and monitoring • Climate controlled storage • Museum quality storage materials

  11. Canister shot Anti-personnel ammunition designed to be shot from a cannon Complex conservation issues Thick marine concretion Unknown material types Composite object

  12. Canister shot x-ray Industrial x-ray Exterior enclosure and shot visible Materials not positively identified Detail showing the canister and shot ball protruding through canister wall. Canister has presumably corroded through. Scanned x-ray of whole object showing small spherical shot inside a canister

  13. Cutting open Cut open with a circular saw Great majority of questions answered as object becomes visible and directly analysable

  14. XRF (X-ray Fluorescence) XRF analysis of a shot ball Australian Museum Bruker XRF instrument Iron only detected

  15. Canister shot treatment Desalination 2% w/v sodium sulphite

  16. Conclusion Conrad Martens Mermaid off Cape Banks December 4 1820, ca. 1840 NLA collection http://nla.gov.au/nla.pic-an2390741

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