c 
Membranous part of the Bladder, as he fays, cut in the 
Operation, yet the Patient recovered and becanie per- 
fe^ly well. 
But thefe, and fuch like furprifing Cures, I rake to be 
erratick or Anomalous, if I may fo call them becaufe 
they happen feldom, and when they do, feem to be 
contrary to the (etled Rqles of Phyfick; and therefore 
can little avail in guiding a Man s Pradice^ according 
to the Saying, Qu^ Rata funt, not fmt Artu : And not- 
withftanding (everal fuch rare Cafes, daily Experience 
will vouch for the Authority of that Aphorifm of Hip- 
pocrates^ YiU^w Sixpcoidv-n StoLvxiZh^y cut Sella efl vejica 
lethale efl^ as not being founded on a few Examples or 
a Notion, but what commcnly holds true, or as Hippo- 
crates often exprefles it, ce'^ ItA to ttdXv, for the mofi 
part^ which is a fufBcient, and indeed the only Princi- 
ple on which we may conftitute a ftanding Rule in Phy- 
fick ; for as the Judicious Celfus has truly obfer ved io 
his Preface to his Book de Re Medica, Fix ulla Petpe- 
tna Vracepta Medicimlis Ars recipit. 
IV. Eclipfis Lunaris Obfer^atio^ faBa RoterO" 
dami die 29. OSlobris Anni i6pj. N. A 
Jacobo Cajpf^iy R. Ac. Parifienfis Socio. 
EClipfis Lunas diei 29 O(5iobris anni 1697, obleivata eft 
Roterodami per Telefcopium quatuor fere pedum Parifi- 
enfiufn ocuiari convexo in cujas foco erant fila quacuor fcle 
in axe interfecantia ad angulos re<5i:os 8c femiredos, ad Pha- 
fes dimetiendas, niacukrumque Lunarium fitum determinan- 
dum. Hoc Telefcopium irapofitum erat falcro habenti axem 
in fitu parallelo axi mundi conftitutum, ut poflquam ad Lu- 
nam diredum eilet ad unius phafis obfervationem, polTet ad 
alias phafes Obfsrvandas per Lunae femitam ad occafum vtvQ" 
C z iui. 
