(33) 
hitherto been obfervedj and that the firft Proctfs is want- 
ing in feveral Creatures, with the reafon thereof. 
Chap, z. A peculiar Strudure and Difpofitioo of the 
Pia Mater isobferved, as being extended even over the 
Corpus ca/Iofum^ and the in- fide of all the V'entricles, that 
other Membrane taken notice of by chn and ][^idloo^ 
as a middle one betvi^ixt the Dura and Pia Mater^ is 
found to be but a Duplicature of the Via Mater, He 
alio takes notice of the Miftake oiWiSis and other 
Moderns, concerning the Glands of this Membrane, 
with the occafion thereof. 
In the third and fourth Chapters, is contained a Na- 
tural Hiftory of the Blood-veflels belonging to the 
Brain , vi^herein , befides a general account of them 
and many Errors hitherto committed concerning them, 
redified , there is defcribed a particular Difpofuion of 
thofe of the outw^ard Integuments explaining feveral 
Th^enomena^ as fome fort of Head-achs, Noifes, in- 
cident to that part. The manner of thefe Veflels en- 
tering, and their Diftribution, being by the help of Ii> 
jedions of Quick- filver and feveral tinged Liquors, ex- 
adly difcovered, prove very fuccefsful to the explaining 
the manner how and in what quantity the Animal 
Spirits are made, and how fo vaft a quantity of Bloody 
from whence they are produced, is conveyed to a part 
fo tender as the Brain is, without any inconvenkoce. 
Chap, $ and 6. treats of the , together with 
their ufo, wherein he obferves thofe lately defcribed 
by Fieuffenius, as new, were firft defcribed by Falloptus^ 
and after taken notice of by Vidus Vidius, The non« 
exigence of Vkuffenim his Receptacula feHm ^qmn^ late* 
r 'thm adjacentia^ is evinced, the occafioa of the miftake 
affigned, 
