[ 100 ] 
about ib in the Afternoon 5 at which time it was 
fomewhat nearer the Earth than the Sun is at its 
Perigee 5 the Comet’s Diftance being then (,83) and 
the Sun’s (,98) fuch Parts, as the Semidiameter of 
the Magnus Orbis is (,100) 5 from which we may 
have fome Idea of the Comet’s Magnitude; and 
therefore may fuppofe it, at leafl, equal to the Earth. 
Jofeph Betts* 
III. Obfervatio de Scirrlio Cerebelli , ah Alberto 
Hallero, R. S. A. Archiat. Reg. & Med, 
c Prof. Getting, ad Reg. Soc. tranfmijfa . 
Read June 14. Erebellum fed cm principii vitalis fecit 
I744 ' Willtjius ; et, qui hanc hypothefin 
ornatiflime propofuit, Boerhaavius. Verum, praeter 
plurima, quae contra nervorum vitalium diftindam 
clailim faciunt, et prater experimentacapta a cl .Lapey- 
ronie , per quse conftat vulnera cerebelli inflida cani- 
bus, non continuo lethalia fuifle, hanc etiam hypo- 
thefin infirmant morbi cerebelli, fatis rari, fed aliqui 
tamen, etiam maximi, et qui cerebellum pene inutile 
redderent, qui setatem tamen tulerunt. Manifefta certe 
inde nafeitur fufpicio, non adeo, ut JVilliJiana requi- 
reret hypothefis,proximam vitalium cordis nervorum, 
in cerebello & folo, originem effe. Quos prssterea 
fatis conftat, minima parte a cerebri nervi odavi, et 
intcrcoftalis ramis, fed a fpinalibus imprimis prove- 
nire, ex quibus, utrurrique ganglion cervicale, multo 
magis, quam a cerebri propagine, provenit. 
Ergo 
