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On fibre: additional observations

Abstracts of the papers printed in the Philosophical transactions of the Royal Society of London, 1843-12, Vol.4, p.384-386

Scanned images copyright © 2017, Royal Society ;ISSN: 0365-5695 ;EISSN: 2053-9142 ;DOI: 10.1098/rspl.1837.0195

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  • Title:
    On fibre: additional observations
  • Author: Barry, Martin
  • Is Part Of: Abstracts of the papers printed in the Philosophical transactions of the Royal Society of London, 1843-12, Vol.4, p.384-386
  • Description: On examining coagulating blood, the author finds that it contains discs of two different kinds; the one comparatively pale; the other, very red. It is in the latter discs that a filament is formed; and it is these discs which enter into the formation of the clot; the former, or the pale discs, being merely entangled in the clot, or else remaining in the serum. He thinks that the filament escaped the notice of former observers, from their having directed their attention almost exclusively to the undeveloped discs which remained in the serum, and thus conceived that the blood-discs are of subordinate importance, and are not concerned in the evolution of fibrin. To render the filament distinctly visible, Dr. Barry adds a chemical reagent capable of removing a portion of the red colouring matter, without altogether dissolving the filament. He employs for this purpose chiefly a solution of one part of nitrate of silver in 120 parts of distilled water; and sometimes also the chromic acid. He admits that the use of these reagents would, on account of their destructive tendency when concentrated, be objectionable as proofs of the absence of any visible structure; but as the point to be proved is that a certain specific structure does exist, he contends that the same appearance would not equally result from the chemical actions of reagents so different as are those of chrome and the salts of mercury and of silver. After the appearance of the filament, thus brought to light, has become familiar to the eye, it may be discerned in the blood-discs, when coagulation has commenced, without any addition whatever. Those blood-discs of the newt, which contain filaments, often assume the form of flask-like vesicles, the membranes of which exhibit folds, converging towards the neck, where, on careful examination, a minute body may be seen protruding. This body is the extremity of the filament in question, its protrusion being occasionally such as admit of its remarkable structure being recognised.
  • Publisher: London: The Royal Society
  • Language: English
  • Identifier: ISSN: 0365-5695
    EISSN: 2053-9142
    DOI: 10.1098/rspl.1837.0195
  • Source: Alma/SFX Local Collection
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