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864 [Doc. 310.
SWEDENBORG’S WRITINGS.
5. The fourth sinus, pp. 372 to 375.
6. The sinus occipitalis, and the lower sinuses, called the longi
tudinal and the lateral, pp. 384 to 391 .
7. The four sinuses of the sella equina.- The quotations from
the anatomists extend from pp. 392 to 400 ; Swedenborg’s own in
duction, however, is wanting.
Of this and the following chapter 25 pages are missing.
8. The arteries and veins of the interior of the head, pp. 425 to 523.
a. First argument from the blood-vessels of the spinal marrow,
and from the azyga and its branches.-The quotations from the
anatomists extend from pp. 523 to 532 ; but the argument itself from
pp. 533 to 569 is missing.
b. Second argument from the ganglia and the intercostal nerve.
-The beginning of this chapter, including, as it seems, the greater
part of the quotations from the anatomists is lost ; but the argument
itself extending from pp. 572 to 584 has been preserved.
c. Third argument from the eighth pair of the nerves of the
head, called also the par vagum.-The quotations from the ana
tomists are complete, but the argument itself is preserved only from
pp. 588 to 592.
A break of 132 pages.
9. This chapter is missing; it seems to have treated of the pia
mater, or the pia meninx.
10. This chapter, the beginning of which is missing, seems to
treat of the "Functions of the Brain in General." The quotations
from the anatomists are lost, but the whole of this most important
induction, which extends from pp. 725 to 825, is preserved. It treats
of the following distinct heads :
a. The action of the brain on the muscles, pp. 727 to 756. This
includes a discussion of the cerebellum, and the spinal marrow.
b. The faculty of sensation of the brain, pp. 757 to 783 ; which
includes a description of the process by which the impressions of
the senses are exalted from a lower degree of the brain to a higher,
and of the mode in which the will is determined into action.
c. The circulation of the purer essences from the brain through the
body by the fibres, and thence back to the brain, pp. 783 to 801 .
Here is shown the continuation of the fibres into the blood-vessels,
and vice versa, and also the division of the blood into its component
essences, whence arises the white or spirituous blood, which circulates
in the fibres. The function of the glands is likewise explained.
d. Concerning the liquid which is secreted from the least arteries
of the brain, and which is circulated by the nerves, and then returns
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