curious, 'tis
hoped, that those who have conveniency, will give encouragement and
assistance for the making of them; and withall oblige the publick by
imparting, what they shall have observed of this kind: The _Publisher_
intending, that when ever such observations shall be communicated to him,
he will give notice of it to the _publick_, and take care of the
improvement thereof to the best use and advantage. A _Pattern_ of the
_Table_, proposed to be made for observing the _Tides_, is intended to be
published the next opportunity, God permitting.

* * * * *

_An Account of Several Books lately published_

I. _Johannis Hevelii DESCRIPTIO COMETAE, Anno AErae Christianae MDCLXV. exorti;
una cum MANTISSA Prodromi Cometici, Observationes omnes prioris COMETAE
MDCLIV, ex iisque genuinum motum accurate deductum, cum Notis &
Animadversionibus, exhibens._

This Book (as the Title it self intimates) undertakes two things. _First_,
To give an Account of the _Second_ of the two late Comets, which appeared,
when the _other_ was scarce extinct; Concerning which, the Author doth,
from the Observations made by himself with a _Sextant_ of 6 foot, and
divided into _minutes_ and _seconds_, assign _both_ its true place (as well
in respect of the _Ecliptick_ as the _AEquator_) _and_ its proper motion;
Adding a fair Delineation of its Course, together with the genuine
Representations of its _Head_ and _Train_, in each day of its apparition;
and subjoyning a General Description and Discourse of some of the more
notable _Phenomena_ thereof. It was first seen at _Dantzick_ by the
Watchmen, the 5th of _April_ st. n. 1665. and then observed by the _Author_
from _April_ 6, about 11/2 of the Clock in the morning, till _April_ 20 at 3.
in the morning. During which time, it went with a reasonable velocity;
making 46 deg. in its Orb, _according to the Order of the Signs_, moving
from the _Breast_ of _Pegasus_, towards the _Head_ of _Andromeda_, and the
_Left Horn_ of _Aries_; having, as 'tis presumed, taken its rise from above
_Sagittary_, and run through the _Breast_ of _Antinous_, under _Aquila_ and
the _Dolphin_, to the said _Pegasus_; and so on, as is already expressed.

The _Head_ of it is in the Book described of a Colour like that of
_Jupiter_, all along much brighter than that of the former Comet, though of
a somewhat less magnitude; having in its middle onely _one_ round, but very
bright and big _Kernel_ or