(1070) 
hands. The Sttbje<ft beiag Curious and weighty, it w;is thought 
fic to advertife the Inquificive Reader, though fomewhat lace, 
cfwhat is difcourfed upon it by other Learned men, befides 
thofe whom we have formerly noted. 
This Author then doth principally difcourfe of the Motion 
and place of that Comet, and how its odd Appearances may 
bcfalved 5 and in regard that in fuch a Difcourfe of the Mo- 
tion of a Body, feen in the Heavens, 'tis requifite ta fuppofe 
the Forna and Conftitution of the Celeftial Bodies ^ and in 
what manner they make their Revolutions, He thought it re- 
quifite^cither to choofefomeor other of themoft famous Hy- 
potliefes concerning them, or elfc to endeavor to folve tne 
Fhanomenaoi this Comet, according to all thofe Syftems : 
Of which two Tasks he hath chofen the latter 5 in the pro- 
fecution whereof he feems fatisfied, that the Comet of 166^. 
was above the Moon-) it having been found without a fenfible 
F^ralUxy for the obferving of which, hefliews an eafie way, 
which needs no Quadrants or Sextants curioufly made ^ nor a 
precife taking of the Meridian Altitudes^ nor theScituationof 
the Comet in the Zodiack-, nor the noting of the precife tim« 
of the Obfervation^ nor tajlly j needs to fear to be prejudiced 
by the Confideratioa of the various Refractions-, forasmuch 
as he works not by the way of taking the feveral Altitudes 
from the Horizon, but by obferving the Pofition of the Co- 
met among fome neighbouring Fixt Starrs : for the doing of 
which; he faith, he employed only a fi in pie Thread ftretch't 
out by an Arch, to make it evident, whether this Comet^iad 
III ERAS- 
