144- Mifcellanea Curioja. 



the fifth day, the Rudiments of the Head and 

 Body do appear; This made Dr. Harvey con- 

 clude, that the -Blood had a being before any- 

 other Part of the Body } and that from it, all 

 the Organs of the Fxtus were both form'd and 

 nourifhed : But by Malpighius's Obfervations 

 we find that the Parts are then only fo far ex- 

 tended, as to be made vifible to the naked Eye, 

 and that they were actually exiftent before, and 

 difcernable by Glaffes* After an Incubation of 

 thirty hours, are to be feen the Head, the Eyes, 

 and the Carina with the Vertebra, diftindt, and 

 the Heart. After forty hours its Pulfe is vifi- 

 ble, and all the other Parts more diitincl:, which 

 cannot be decerned by the naked Eye before 

 the beginning of the fifth day \ from whence it 

 feems probable, that even the fo early difcove- 

 ry of thole Parts of the Fcetus by the Microf- 

 cope, is not the decerning of Parts newly for- 

 med, but only more dilated and extended by 

 receiving of Nutriment from the Colliquamentum j 

 fb that they (eem all to have been actually ex- 

 igent before the Incubation of the Hen. And 

 what Svpammerdam has difcovered in the tranfc 

 formation of Infe&s, gives no fmall light to 

 this ; whilfr, he makes appear in the Explana- 

 tion of the 1 3 th Table of the General Hiftory 

 ot Infects, that in thofe large Erucas which 

 feed upon Cabbage, if they be taken about the 

 time they retire to be transformed into Amelia V, 

 and plungM often in warm Water to make a 

 Rupture of the outer Skin, you will difcern 

 through the tranfparency of their fecond Mem- 

 brane, all the Parts of the Butterfly, the Trunk, 

 Wings, Feelers, £?c. folded up. But that af- 

 ter the Eruca is chang'd into an Aurelia, none 

 of thefe Parts can be difcern'd, they are fo 



drencht 



