MARINE B O RE R Important jetties in Swansea Docks were being damaged by marine borer shipworms; which had gnawed their way into the wooden piles under water, honeycombing and weakening the entire structure. Immediate action was needed to save the jetties. The owners took their problem to the technical service organisation of I.C.I, and a repre- sentative of the Company' S Nobel Division in Glasgow was sent to make an investigation. He began by experimenting with small charges of gelatine explosives fired at known distances from the piles. The shock wave from these under: water explosions had to be strong enough to kill the borers in their holes, but not SO powerful as to weaken the jetty piles. After each shot a diver went down to look for Signs of damage; and small sections of the wood were removed to assess the killing effect on the borers. The work went well and a local man who had studied the technique took over: These unorthodox methods were completely successful: The borers were killed and at low cost to the owners the safety of the jetties was ensured for another season. ICI IMPERIAL CHEMICAL INDUSTRIES (NZ) LTD: for cut in coats and frocrs See "Mamhaa fvot DH3 style and
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https://paperspast.natlib.govt.nz/periodicals/NZLIST19550325.2.35.1
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New Zealand Listener, Volume 32, Issue 817, 25 March 1955, Page 19
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208Page 19 Advertisement 1 New Zealand Listener, Volume 32, Issue 817, 25 March 1955, Page 19
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Copyright in the work University Entrance by Janet Frame (credited as J.F., 22 March 1946, page 18), is owned by the Janet Frame Literary Trust. The National Library has been granted permission to digitise this article and make it available online as part of this digitised version of the New Zealand Listener. You can search, browse, and print this article for research and personal study only. Permission must be obtained from the Janet Frame Literary Trust for any other use.
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