Page:Philosophical Transactions - Volume 003.djvu/270

 immediately out of them into the hollow and fistulous fibres, to be conveyed by a continued course into the subjacent parts to execute it's several offices, as is performed by the little Tubes or Pipes of Plants: adding for the illustration of the Original of the Spinal Marrow and the Nerves, that that Marrow is a Bundle of Nerves, which whilst makes up the Brain, divides it into two parts (by the circumvolutions of which the sides of the ventricles are formed) and terminates at last in the Cortex, wherein, and in whose Glandular grains the extreme roots of the Nerves, in the smallest size, are implanted. After this he proceeds to the use of the Cortex, and is of opinion, that by these little Glanduls there are separated and collected those particles, which Nature has design'd for Instruments of Sensation, and by which, when convey'd through the tubulous Nerves, the coherent parts are impregnated and swell'd, and the Animal made sensible of the operations of several Objects. Moreover he advances some consideration of his, upon the Learn'd Dr. Willis 's Opinion about the Production of the Internal Sences by vertue of the Brains structure; and also upon his ascribing to those Bodies, he cals striata and radiosa, a twofold texture, whereof the one ascends, the other descends, for the perception of the impressions of Sensible Objects by the former, and the performance of Motions by the latter. Lastly, he takes notice that the famous Dr. Clisson hath derived the matter of the Nervous Iuyce through the nerves into the Brain, from the Glanduls of the Mesentery; and Fortius, from the Mouth and Intestins; whereas, since he has observed the Masse of the Brain made up only of a Glandular Cortex, and of Fibres proceeding from thence, together with the sanguineous vessels, and not yet found any cavities for receiving the Chyle, and conveying it into every part of the Brain; he therefore conceives, that all the Nerves are produced Out of the Brain and the Cerabellum, for this end, that they may carry down the juice separated in the very Glanduls; there wanting no sanguineous vessels, by which both sufficient matter may be furnisht, and the residue of the percolated Iuyce carri'd away again.

Concerning the Kidneys, he first relates, what hath been taught of them hitherto; and then delivers both his own observations about them, Rh