niember^I did, when I wasfollicitous to obferve theProcefTe 
of Nature in the Formation of a Chick, open Hens Eggs^ 
fome at fiicha d?.y , and fome at other daies after the be- 
ginning of the Incubation^ and carefuHy taking out the 
Embryo's ^ cmbahned each of them in a d^ftind: Glafs (which 
is to be carefully ftopt ) in Spirit of Wine : Which 1 did, 
thatfo I might have them in readineiTe , to make on them , 
at any time,- the Obfervations 5 I thought them capable of af- 
fording s and to let my Friends at other feafons of the year, 
fee , both the differing appearances of xhe Chick at the third, 
fourth, fevendij fourteenth, or other daies, after the Eggs had 
been fate on, ^«^3?(efpeGial!y)fome particulars not obvious in 
Chickens, that go about ; as the hanging of the Quits out of 
the Abiomsn, &c. Mow long the tender Embryo of the Chick 
foon after the FunUum faltms is difcoverable , anoi whilft the 
Body feems but a litde Organixed Geily , and fome while 
aherThat^ will be this way preferv'd, without being too much 
flirivel'd up, I \^as hindred by forae mifchances to fatisHe my 
felf : but when the Fietm's^I took out^were (o perft(5t!y formed 
as they were wont to be about the fcventh day, and afterj they 
fo well retained their lliape and bulk , as to make me not re- 
pent of mycuriofity: And fome of thofe ^ which I did very 
e^rly this Spring, lean yet fliew you. I know I have men- 
lion'd to you an eafie application of what I , fome years finee, 
made publick enough 5 but not finding it to have been yet 
made by any other, and being perfwadedby Experiencej that 
it maybe extended to other i^/^^ai// , which this feafon (the 
Spring y is time to make provifion off, I think the Advertifk^ 
ment will not feem anfeafonable to fome df our Friends > 
tfiough being now in hafle^ and having in my thoughts divers 
particulars^ relating to this way of Preferving Birds taken out 
of the Egge, and other fmall Fetus's, I muft content my felf to 
have mention'd that, which is EJJendal, leaving divers other 
things, which a little prad:ife may teach the Curious , unraen- 
tion'd. Notwithftanding which , I muft not omit thefe two 
Circumfi:ances ; the one^ that when the Chick was grown big, 
before I took it out of the Egge^ I have (but not conftantly ) 
