586 PHILOSOPHICAL TRANSACTIONS. [aNNO 1 6/ 1 i 



1 . Non tanthm in nuptis et foecundis mulieribus, sed etiam in virginibus esse 

 non mintis quam in Gallinis ova ponentibus etiam citra Galli consuetudinem, 

 ova quaedam pisi viridis magnitudine, in quibus humor latet intus, qui, uti alio- 

 rum ovorum albumen et vitellus, dum coquitur, indurescit : porro, ova ilia 

 mulierum, pelliculis extrinsecus circumdari, quas postquam in uterum prolapsa 

 sunt ova coitt!i foecundata, in Amnion et Chorion brevi commutentur ; ova au- 

 tem ipsa, duorum vel trium dierum spatio ad cerasi nigri majoris niagnitudinem 

 excrescere.* 



2. That he once met with and opened a foetus of but three, or at most four 

 days old, and found in a little globule that nature had already formed therein 

 the rudiments of a human body, so as that he could plainly distinguish the 

 head from the mass of the body, and see in the head (though but obscurely) 

 several pricked marks for organs ; the body in the mean time being nothing 

 but an undigested lump.'}' 



3. That in a foetus fifteen days old, he could distinguish the eyes, nose, 

 mouth, ears, arms and feet. 



4. That in another twenty-one days old, he was able to separate the matter 

 prepared for flesh and skin, from that which was to be hardened into bones. 

 As also, that the head seemed nothing but a membrane distended with wind 

 and spirits ; but its arms and hands were figured, and the fingers and toes 

 themselves distinct. Besides, that in that cartilaginous part, designed for the 

 bones, he could number the ribs. 



5. That in one of the age of a month, he discovered some more consistency, 

 and the upper and lower jaw bone represented by two bony puncta; besides the 

 claviculse formed, and almost all the ribs distinct, the shoulder blade, and 

 elbows, thigh bones, and both the leg bones, called focilia ; where, by the by, 

 he intimates that a certain acid spirit in the world is the efficient, as of all firm- 

 ness and solidity, so of that in bones. 



6. That, lastly, in a foetus of six weeks he found that it only differed in size 

 from that of two months, by him formerly described in his Osteogenia ; but 

 that the main thing he took notice of in this was the distinction of six small 

 bones in the lower jaw, which after the production of the foetus into the world 

 do coalesce into one. 



All this the author has represented by figures, and endeavoured to confirm 

 by answering what may be objected against his observations. 



* t It has been already mentioned, at p. 413 of this volume, tliat these observations are not to be 

 relied on. 



