[ii8i] 
(aUorving 60 miles to a Degree of Latitude -^) or the 
third part of a quarter of a Mile. Which is fo niccy n$ 
that^ whereas we are wont to enquire^ what is the Foles 
Altitude at London ? what at Paris ? what at Dantfiick > 
and fo forth: This is much the fame as to enquire, what 
it is at Cbaring-Crofs what White-hall Gate > 
{ Suppojing them to be difiant Northward, one from the 
other, of an Englifh Mile, or ^^o foot,) or [becUufe 
Degrees of Longitude; are, in the lejfer Parallels, lefs 
than degrees ^Latitude) much the fame as to enquire^ what 
a-clock^ it is at the Eaft-end t and, what at the Weft- 
end, of the Abby-Church in Weitminfter f 
The i8'\ and 24'^. from the Author to Mr. Olden^ 
burg, are of another fubjed:. Being a Continuation of 
the Hiftoty, of the New Star, in the Neck of Cetm s 
which hath been oblerved lometimes to appear, lome- 
times to difappear, and then return again, and with 
very different degrees of light; as likewifeof two fuch 
others in Cygnus, (one in the Breaft, the other under 
the Head.) He had formerly ('with his Mercurim in 
4?e?/^/ publifhed in the year \66%) given an account of it 
from the year 1638 till that time. Which here he 
continues from thence to the beginning of the year 
1(577 i and then again to the end of that year. And 
then again (after all thefe Letters,) from the beginning 
of 1(^78 to the deftrudion of his Oblervatory in 1(^795 
and (after fomeintermiilionfor that reafonj from id8r, 
till toward the end of 1583. 
Having difpatched what properly concerns his Jnnus 
CJtmaclerzcii^s , and the Letters relating thereunto: Fie 
-gives us the Contimiation of his Obfervations lince that 
time. 
He begins with that of the Comet, (bxxt without an 
Inftrument , having loft ^V\,) Dec. 2.3.4, (new ftile ) 
i6%6. while it was Matutine ("before the Sun-rifing:) 
and 
