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member, I did, when X wasfollicitous to obferve theProceffe 
of Nature in the Formation of a Chick, open Hens Eggs , 
fome at fuch a day, and fome at other daies after the be- 
ginning, of the Incubation, and carefully taking out the 
Embryo's , embalmed each of them in adiftin& Glafs (which 
is to be carefully ftopt ) in Spirit of Wine ; Which I did, 
that fa I might have them in readineffe, to make on them, 
at any time, the Ohfer vations , I thought them capable of af- 
fording ^ and to let my Friends at other feafons of the year, 
fee , both the differing appearances of the Chick at the third, 
fourth,feventh, fourteenth, or other daies, after the Eggs had 
- been fate on, W(efpeciaIly)fome particulars not obvious in 
Chickens, that go about ; as the hanging of the Gutts out of 
the Abdomen, &c. Mow long the tender Embryo of the Chick 
foon after the FunUurn fallens is difcoverable f and whilft the 
Body feems but a little Organixed Geliy , and fome while 
after That, will be this way preferv’d, without being too much 
fhrivebd up, I was hihdred by fome mifchances to fatisfie my 
felf: but when the Fatus'sfl took out, were fo perfectly formed 
as they were wont to be about the feventh day, and after, they 
fo well retain'd their lhape and bulk , as to make me not re- 
pent of my curiofity : And fome of thofe , which I did very 
early this Spring , I can yet fhew you, I know I have men- 
tion'd to you an eafie application of what I , fome years fince, 
made publick enough ; but not finding it to have been yet 
made by any other, and being perfwadedby Experience, that 
it maybe extended toother 'Fcetuss , which this feafon (the 
Spring ) is time to make provifion off, I think the Advertife - 
ment will not feem unfeafonable to fome of our Friends ; 
though being now in hafte , and having in my thoughts divers 
particulars, relating to this way of Preferving Birds taken out 
ot the Egge, and other fmall Fatus’s, T muff content my felf to 
have mention d that, which is Ejjential, leaving divers other 
things, which a little pradtife may teach the Curious , unmen- 
tion d. Notwithstanding which , I mu ft not omit thefe two 
Circumftances ; the one , that when the Chick was grown big, 
before I took it out of the Egge 8 I have (but notconftantly ) 
mingled 
