C 5^5 1 
the Ventricles, and force out of it an equal quantity of 
the crude Liquor before contained in it. During this 
Impulfion the Ventricle is hindred from contraftintr it- 
felfj and the Fibres are relaxed ^ but no fooner is^his 
iaipediment removed,but the Spirituous Fluid aOrs on the 
Fibres of thpHeart, and caufes it to contrad itfelf. Now 
the Dilatation and Contraftion of either of thefe An* 
tagonift parts being performed in an inftant of time, it 
niuft neceflarily fall out, that the Auricles, after their 
Dilatation is over, will again contraft themfelves, 
when the Ventricles are relaxed, and when thefe are 
contraded the Auricles on the contrary v/ill be dilated. 
And thus the Author thinks he has explained the Great 
Spring of the Animal Machine. 
To juftifie himfelf from the charge of borrowing 
I from Monfieur Vieujfens^ he annexes the whole eleventh 
Chap, t/e Motu Cordis AHricuLamm illius^ out of his 
Book de Vrincipk proximk remotk mixtorum. Nor 
can he forbear to charge with fomeeagernefs that Gen- 
tleman, for robbing him of his Invention, of extorting 
an Acid out of the Blood by diftilling its fixed Salt 
with Bole, which way he pretends firft to have revifed 
. and taught in his publick Ledures. 
^ EjufJem Dijfert at io Academic a An Incubo 
Terrum rubiginojuin ? Monfp. r694^ in 12* 
'"T^He Incubus^ or Night-mare, as it is called in En- 
A g^^fi^ is not a meer Dream or Fancy ^but a real in- 
difpofition. Tlio fome" Dreams are the pure efFedsof 
hazard or chance, yet thofe which often receive and 
- have a determinate objed, arife from fome imprefFions 
which the Spirits receive from the Body. Thus when 
the VeiTels are full of a hot jemen^ it is natural to dream 
of Venery, when the Urine irritates the Bladder, of 
U u u u 2 - ma- 
