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member, I did, when I was sollicitous to observe the Processe of Nature in the Formation of a Chick, open Hens Eggs, some at such a day, and some at other daies after the beginning of the Incubation, and carefully taking out the Embryos, embalmed each of them in a distinct Glass (which is to be carefully stopt) in Spirit of Wine: Which I did, that so I might have them in readinesse, to make on them, at any time, the Observations, I thought them capable of affording and to let my Friends at other seasons of the year, see, both the differing appearances of the Chick at the third, fourth, seventh, fourteenth, or other daies, after the Eggs had been fate on, and (especially) some particulars not obvious in Chickens, that go about; as the hanging of the Gutts out of the Abdomen, &c. How long the tender Embryo of the Chick soon after the Punctum saliens is discoverable, and whilst the Body seems but a little Organixed Gelly, and some while after That, will be this way preserv'd, without being too much shrivel'd up, I was hindred by some mischances to satisfie my self: but when the Fœtus's, I took out, were so perfectly formed as they were wont to be about the seventh day, and after, they so well retain'd their shape and bulk, as to make me not repent of my curiosity: And some of those, which I did very early this Spring, I can yet shew you. I know I have mention'd to you an easie application of what I, some years since, made publick enough; but not finding it to have been yet made by any other, and being perswaded by Experience, that it maybe extended to other Fœtus's, which this season (the Spring) is time to make provision off, I think the Advertisement will not seem unseasonable to some of our Friends; though being now in haste, and having in my thoughts divers particulars, relating to this way of Preserving Birds taken out of the Egge, and other small Fœtus’s, I must content my self to have mention'd that, which is Essential, leaving divers other things, which a little practise may teach the Curious, unmention'd. Notwithstanding which, I must not omit these two Circumstances; the one that when the Chick was grown big, before I took it out of the Egge, I have (but not constantly)
