C ipgi ) 
iHFie CeYkmm • yet fbmerimes it hardens into a Membrane, 
. wbkii Iricki ]g cloii to the Membrafsd Tympanic hinders 
the tVceacccB of the Air, and (b caufes a Deafneft, till it is 
removed by Art, 
^ ■ Our Author oMerves in the back-part of the Auricle a 
Vein^ which he fays none has hitherto taken notice of; 
^ and calls it Oa7/?/>^/^, becaufe it receives feveral Twigs 
from other parts aix)ut the Occiput, from all which it 
brings back the refluent Blood into the lateral 6^/>i5^*s, 
piercing the Cranium at a hole behind the Vrocejfm Mam- 
None of the branchings of the hard portion of the 
' Auditory Nerve are fpread opon the backfide of the Au- 
ricte, as fome write and delineate, for the Nerves that 
fupply that part come out between the firft and fecond 
Vertebra colli : A twig of this Nerve running upon the 
" |)ack of the Antitragus is fometimes fuccefsfully cauterized 
in the Tooth-ach. 
It's very probable, that there are Lymphaticks both ia 
^ the Auricle and Auditory paffage;. 
That the Mcvfhana Tympani is made up of two Mi?m- 
■ branes is very apparent in a Fcetm, the innermoft of which: 
is from the Dura maitr^ and the oiitermoft is only an 
expanfion or continuation of that fine Skin that invefts the 
Meatuf Anditoritis. 
He thinks the paffing of the Smoke of Tobacco trooi 
« the Mouth by the Ears, the evacuating ofT///, &c. from 
jtfie Barrel the fame way, feem to evince the neceflity of a 
^Perforation, or Hiatus^ in the Membrana Timpani tho 
none of his repeated Experimejits were fo faccefsful as to 
difcover it hitherto. 
He reckons the Si*;/«/"8 of the Froceffnt Mamil/arer, 
which are divided' into feveral Ca^/ernous Cells, as part of 
' the cavity cf the Barrel, becaufe they communicate with 
^ it : And in fome other Animals, where thefe Swffs*s are 
'^'wanting, the Cavitas Tjmpani is confiderably larger. 
' The 
