hinder the Spirits, wherewith the frothy Seeds abound, from being at that time dissipated, and afterwards to serve to contain the Infant and the waters therein, in the midst whereof it swims that they may not stream away.
Now as the Membranes of the Infant are the first part formed, so are they with the waters, the first that present themselves to the passage in time of labour, before the In∣fants head.
Concerning these Membranes and the de∣scriptions most Authors have made of them, I find them to be so dark therein that me∣thinks 'tis an hard matter to conceive them, as they are, by the explication they make of them: for in the first place they do not agree in the number of them, some accounting 3, as well for a Child as a Beast, to wit the Cho∣rion the Amnios and the Alantoides; Others accounting but 2, because there is no Alan∣toides in an humane fetus.
But if this matter shall be strictly examin∣ed, as hath been often done, there will never be found any more then 2, the which being so closely joyned the one to the other, they may be said to be but a double one, the which in∣deed may be divided and separated into 2, and this I will explain, to you and others, on such a manner, as may be best understood by such as are ignorant of this matter; For