An introduction to the study of seaweeds / by George Murray.

  • Murray, George (George Robert Milne), 1858-
Date:
1895
Catalogue details

Licence: Public Domain Mark

Credit: An introduction to the study of seaweeds / by George Murray. Source: Wellcome Collection.

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    much lacerated, and should be collected at once to be of any value, since exposure quickly spoils them. The ordinary form of dredge used in securing zoological specimens serves for seaweeds, but is liable to become choked. Reinke's dredge, armed with cutting teeth like spear- heads surrounding the mouth, has been found to be service- able, and a simple contrivance shaped like the letter A, with strong fishhooks of the largest size on strong cords attached to the cross-bar, and the ends of the legs weighted, has been recom- mended, but requires skill and judgment in its use. It is likely to disappoint the experimenter unless under very favourable con- ditions. A light dredge can be easily worked from a rowing- boat, which is also sufficient for no. i.-Reinke-s Dredge, tow-netting with fine silk nets for the capture of the free-float- The traveller who wishes to examine the minute pelagic Algse from the surface layers of the ocean can do so by obtaining permission to tap an inlet pipe of a steamship, and allowing the water to run through a fine silk bag for a time, when he will be rewarded with results similar to those from tow-netting. This method has been success- fully practised by its inventor, Dr. John Murray, of the Challenger expedition. ing minute Algse.
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