The motive power of the human system : with the duodynamic symptoms and treatment of chronic diseases / by H.H. Sherwood ; revised by H.H. Sherwood's successor, William Larned.

  • Sherwood, H. H. (Henry Hall)
Date:
1850
Catalogue details

Licence: Public Domain Mark

Credit: The motive power of the human system : with the duodynamic symptoms and treatment of chronic diseases / by H.H. Sherwood ; revised by H.H. Sherwood's successor, William Larned. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

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    In fig. 7 we have a vertical section of the brain through the convolu- tions, inferior ganglion ro, and the cavity of the third ventricle, in the centre of which is seen the letter o. This section is made through the right,and exposes the left side of the cavity, as seen in the figure. fig. 7. The radiations extend from the surface of the ventricle into the sub- stance of the brain, like rays of light. The colour of the central part of the brain is bluish white, and in the convolutions reddish grey. In both cases they are no doubt the consequence of the presence of iron, it having been ascertained that there is iron enough in forty men to make a plough-share, and as there is ten or eleven times the quantity of blood (whichis also coloured with iron,) repelled from the heart to'the brain, than there is to any other part of the same size, an estimate may be formed of the quantity of iron constantly in it, and consequently of its ability to maintain magnetic poles. On an attentive examination of these views of the structure of the brain, it will be found to have five poles. A very large one in the cen- tre, and four small ones in the circumference. One, unseen, radiating from the centre of the cavity o, one in the right lobe of the cerebel- lum, nl, and another in the left, and one in the right and front part of the cerebrum 8, and another in the left. This was seen to be an extraordi- nary number and arrangement of the poles, as we have been accustomed