Generation is nothing else then separating a branch from the tree & giving it better nourishment. If a separated branch takes root in the earth & or a separated twigg or bud by grafting or inoculation {illeg} is nourished from ye root of a young stock, it grows into a \new/ tree as big a the f|t|ro|e|e from wch it was separated being better nourished from a young root then from an old one. The seed of a tree while it grows upon the tree has the nature of a branch or twig or bud, {where} it while it grows upon ye tree it has the nature of is a part of it like a bud {illeg} the tree: but if separated & set in the earth to be better nourished, the embryo \or young tree/ conteined in it takes root & grows into a new tree. \like manner/ The egg of a female \wth the embryo formed in it/ while it grows in the ovarium {illeg} seed is a part \branch/ of ye mothers body but the Embryo formed in it \& partakes of her life, {illeg} \&/ The embryo/ is as capable of growing great being separated from the mother & growing great by due nourishment as a branch or twigg or budd or seed \of a tree/ is of being separated from the tree & growing into a new tree. For by the act of generation nothing more is done then to ferment the sperm of the female by ye sperm of ye male that it \may/ thereby become fit nourishment for ye Embryo. For ye nourishment of all animals is prepared by fermentation \\& the ferment is/ taken from animals of the same kind , being {illeg} \& makes the nourishment/ subtile & spiritual. thereby/ In adult animals the nourishmt is fermented by the choler & pancreatic juice, & much more ought ye nourishemt of an Embryo to be prepared by fermentation & this for yet \both wch come from the blood. The Embryo not/ being able to ferment its own nourishment {illeg} \wch comes from the mothers blood has it/ fermented by the sperm wch comes from ye fathers blood, & by this nourishment {bec} |it| swells, drops off from & Ovarium & begins to grow with a life distinct from that of ye mother. And in Oviparous creatures if the sperm of the female {illeg} be not an ingredient of the egg \fermented with the sperm of the {f}|m|ale/ the white & ye yelk {sic} \of the egg/ will |not| be fit nourishment for the Embryo. [So then generation is nothing else then the the Embryo grows upon the body of the mother before generation as a twig grows upon a tree & \all/ generation is nothing else than the preparation of due nourishments for the Embryo to grow with a distinct life distinct life when separated. from th]

Now in all fermentation wch generates spirits, the ferment abounds wth a supprest acid wch being more attracted by the other body forsakes its own <235v> to rush upon & dissolve ye other & by the violence of the actions breaks both its own particles & the particles of ye other body into smaller particles & these by their subtilty volatility & continual digestion {illeg} resolve ye whole mass into into as subtile parts as they \it/ can be resolved by putrefaction. [And by this means bodies \must/ lose their old form & texture before they & be \destroyed &/ broken to pieces into the last parts before they can be formed.] For as an old house must be pulled {illeg} down & its stones separated before they can be put together in another manner a new house can be be {sic} built out of their its materials: So \natural/ bodies must be \dissolved/ broken & separated into {illeg} their least parts by fermentation & putrefaction & lose their \old/ form \& texture/ before they can be formed anew a new \natural/ body can be formed out of them.

And when the nutriment \nourishment/ is thus prepared by dissolution \& subtiliation/, the particles {illeg} are of the body to be nourished draw to themselves out of the nourishment the particles of the same density & nature wth themselves. For bodies particles of one & the same nature draw one another more strongly then particles of different natures do. And when |And {sic} therefore in the bowels of the earth {illeg} particles of the same nature are apt to assemble in the same masses & those of different natures in different masses. And when| many particles of the same kind are drawn together out of ye nourishment they will be apt to coalesce in such figure textures as the particles wch drew them did before because they are of the same nature because as we see in \the particles of/ salts wch if they be of the same figure kind always crystallize in the same figures. And b for faciliating this assimilation of ye nourishment & presering the nourished bodies from corruption it may be presumed that as electric attraction is excited by friction so the electric {atr} it is {excited} \invigoted|ra|ted/ also by the vegetable {life} life so it may be invigorated also by some other causes & particularly \by some agitation caused in the electric spirit/ by the vegetable life of the |particles of| living substances: & the ceasing of this vigour upon death may be \the/ reason why |ye| death \of Animals/ is accompanied wth putrefaction.

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Professor Rob Iliffe
Director, AHRC Newton Papers Project

Scott Mandelbrote,
Fellow & Perne librarian, Peterhouse, Cambridge

Faculty of History, George Street, Oxford, OX1 2RL - newtonproject@history.ox.ac.uk

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