Particulars, even from the meanest in a Commonwealth, may chance to make a Publick disturbance, so likewise in the Common-wealth of the body, one single action in a particular part may cause a disturbance of the whole Body, nay, a total ruine and dissolution of the composed; which dissolution is called Death; and yet these causes are neither Light, nor Blas, nor Gas, no more then men are shining Suns, or flaming Torches, or blazing Meteors, or azure Skies. Wherefore leaving your _Author_ to his contradicting humor, I rest, Madam, _Your faithful Friend_ _and Servant._ XXXII. _MADAM,_ I do verily believe, with the Schools, the _Purging of the Brain_, against your _Author_;[1] For I know no reason, why all the parts of a man's body should not stand in need of evacuation and Purging, as well as some. 'Tis true, if the substance or nourishment received were all useful, and onely enough for the maintenance, subsistance and continuance of the Creature, and no more, then there would be no need of such sort of evacuation; but I believe the corporeal self-motions in a body, discharge the superfluous matter out of every part of the body, if the motions of the superfluous matter be not too strong, and over-power the motions in the parts of the body; but some parts do produce more superfluities then others, by reason their property is more to dilate, then to contract, and more to attract, then to retain or fix; which parts are the brain, stomack, bowels, bladder, gall, and the like: wherefore, as there is nourishment in all parts of the body, so there are also excrements in all parts, for there is no nourishment without excrement. Next your _Author_ says, That _the nourishment of the solid parts is made with the transmutation of the whole venal blood into nourishment, without a separation of the pure from the impure._ But I pray give me leave to ask, _Madam_, whether the solid Parts are not Instruments for the nourishment of the Venal blood? Truly, I cannot conceive, how blood should be nourished, wanting those solid parts, and their particular motions and imployments. Again: his opinion is, _That the brain is nourished by a few and slender veins; neither doth a passage or channel appear whereby a moist excrement may derive, or a vapour enter._ And by reason of the want of such a passage, in another place[2] he is pleased to affirm, _That nothing can fume up from the stomack into the brain_, and therefore _Wine doth not make drunk with fuming from the stomach into the head, but the Winie spirit is immediately snatched into the arteries out of the stomach without digestion, and so into the head, and there breeds a confusion._ First, I am not of the opinion, that all nourishment comes from the veins, or from one particular part of the body, no more do Excrements; neither do I believe that every passage in the body is visible to Anatomists, for Natures works are too curious and intricate for any particular Creature