Moored deep-sea installations are frequently set adrift when their synthetic fiber mooring lines arc bitten by some organism, presumably a fish. Some information on the causative organism has been obtained by mooring buoys in 2,000 m of water near Bermuda with lines sheathed or coated with plastic materials that took dental impressions.The evidence provided by this material suggests that the causative organism is active from 150 to over 1,500 m in depth, with the greatest concentration from 600 to 1,000 m. The jaw ranges from 30 to slightly over 100 mm in width and the teeth are located either in the upper or lower jaw but not both. The teeth are sharp with a fine. band of rounded scrrations along the cutting edge.
A method t is presented for detecting and observing changes in the histological sturcture of cotton fibres during the course of biological mildew devleopment. Fibre elements are first stained by the use of a 0.15% aqueous solution of Victoria Blue B. Swelling of the dyed fibre in cuprammonium solution containing not more than 0.8% copper is then used to accentuate and separate the finer structures for microscopic observation. The appearance of typical samples of normal raw cotton and badly mildewed raw cotton are shown in a series of eight photomicrographs.
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