The nervous system and its functions / By Herbert Mayo.

  • Herbert Mayo
Date:
1842
Catalogue details

Licence: Public Domain Mark

Credit: The nervous system and its functions / By Herbert Mayo. Source: Wellcome Collection.

    26/208 page 12
    spinal cord of fish it is very faintly discernible. In the larger invertebral animals, the difference of colour is again distinct. The successive observations which authorize the above general assertions as to the structure of the two tex- tures, are those of Ehrenberg, and after him of Valentin. In the fresh brain of a small bird the general corpuscular texture of the gray matter, and the tubular structure of the white, arereadily apparent. Fontana had anticipated, to a considerable degree, the discovery of the tubular structure of white nervous matter; but his observations, and the recent researches of Dr. Martin Barry, would go to render the tubular character subordinate, and to attach greater importance to the interior filamentous structure. II. Thé disposition of the two textures is deci- sively affirmative of this conclusion. The gray matter forms isolated organs. These are united together by tracts of white matter, the filaments or tubes composing which tend
    No text description is available for this image
    No text description is available for this image
    No text description is available for this image