And upon this Principle, it is very easie to make several sorts of contrivances that should thus wreath and unwreath themselves, either by heat and cold, or by driness and moisture, or by any greater or less force, from whatever cause it proceed, whether from gravity or weight, or from wind which is motion of the Air, or from some springing body, or the like. This, had I time, I should enlarge much more upon; for it seems to me to be the very first footstep of _Sensation_, and Animate motion, the most plain, simple, and obvious contrivance that Nature has made use of to produce a motion; next to that of Rarefaction and Condensation by heat and cold. And were this Principle very well examin’d, I am very apt to think, it would afford us a very great help to find out the _Mechanism_ of the Muscles, which indeed, as farr as I have hitherto been able to examine, seems to me not so very perplex as one might imagine, especially upon the examination which I made of the Muscles of _Crabs_, _Lobsters_, and several sorts of large Shell-fish, and comparing my Observations on them, with the circumstances I observ’d in the muscles of terrestrial Animals. Now, as in this Instance of the Beard of a wilde _Oat_, we see there is nothing else requisite to make it wreath and unwreath it self, and to streighten and bend its knee, then onely a little breath of moist or dry Air, or a small _atome_ almost of water or liquor, and a little heat to make it again evaporate, for, by holding this Beard, plac’d and fix’d as I before directed, neer a Fire, and dipping the tip of a small shred of Paper in well rectify’d spirit of Wine, and then touching the wreath’d _Cylindrical_ part, you may perceive it to untwist it self; and presently again, upon the _avolation_ of the spirit, by the great heat, it will re-twist it self, and thus will it move forward and backwards as oft as you repeat the touching it with the spirit of Wine; so may, perhaps, the shrinking and relaxing of the muscles be by the influx and evaporation of some kind of liquor or juice. But of this Enquiry I shall add more elsewhere. * * * * * Observ. XXVIII. _Of the Seeds of _Venus_ looking-glass, or _Corn_ Violet._ From the Leaves, and Downs, and Beards of Plants, we come at last to the Seeds; and here indeed seems to be the Cabinet of Nature, wherein are laid up its Jewels. The providence of Nature about Vegetables, is in no part manifested more, then in the various contrivances about the seed, nor indeed is there in any part of the Vegetable so curious carvings, and beautifull adornments, as about the seed; this in the larger sorts of seeds is most evident to the eye; nor is it lest manifest through the _Microscope_, in those seeds whose shape and structure, by reason of their smalness, the eye is hardly able to distinguish.