fjOl) ■ 
Thermoweters^ Bar meters, Hjgrofcopes. 
Thefe Obfervations being thought very confiderable as well as carious ,*ds- 
hoped, that thofe who have conveniency, will give encouragement and alii- 
{tance for the making of them • and withall oblige thepublick by imparting, 
what they (hall hare obfervedof this kinds Th epubiifher intending, that 
when ever fuch obfervations {hall be communicated to him, he will give no- 
tice of it to the public^, and take care of the improvement thereof to the beft 
life and advantage. A Pattern of the Table , propofed to be made for observing 
the Tides , is intended to be publifhed the nest opportunity, God permitting. 
An Account 
Of fever al Books lately pub li fed. 
I. fohannu Hevelii DE SC RJPTIO CO Ad E TnAZ t Anno zAEr& 
Chrifiiana MDCLXV * exorti j und cum M A NT1 S S A Prodrome Co‘ 
metni,Obfervationes omnes priori COME T <t/£ MDC L IV, ex iifsjus 
geminum motum accurate dednttHm,cum Notis & Animadverfionibus jxhibens . 
This Book (as the Title it felf intimates) undertakes two things. Fir# t To.- 
gitfe an Account of the Second of the two late Comets, which appeared, when 
the ether was fcarce exftimft •, Concerning which, the Author doth, from 
the Obfervations made byhimfelf with a Sextant of 6 foot, and divided into 
minutes and feconds, affign both its true place (as well in refpei: of the M~- 
eliptickas the Equator) and its proper motion •. Adding a fair Delineation 
©fitsCourfe, together with the genuine Reprefentations of its Head andi 
Train , in each day of its apparition ; and fubjoyning a General Defcription 
and Difcourfe of fome of the more notable Phenomena thereof. It was firft 
ken at Dantzick by the Watchmen, the 5th of April ft. n. r 66^. and then 
s^bferved by the Author from April 6.about if of the Clock in the morning, 
nWApril ao«at 3 ♦ in the morning. During which time, it went with a reafon- 
able velocity • making 46 deg. in its Orb , according to the Order of the 
Signs, moving from the Brea# of Pegafus , towards the plead of Andromeda 
and the Left Horn of Aries • having, as S tis prefumed, taken its rife from 
above S aginary , and run through the Brea# of Antinous, under Aquila , and: 
« the Dolphin to the faid Pegafus and fo on, as is already expreflfed. 
The Head of it is in the Bookdeferibed of a Colour like that of Jupiter, all 
along much brighter thanthatof thrformer Comet, though of a fomewhat 
Sefs magnitude ^ having in its middle onely one round, but very bright and big: 
Kernel or Speck, refplendent like Gold, and encompaffed with another more: 
dilute and feemingly uniform matter : its Tail being at firft, about 17 deg. 
and afterwards 2©, and fometimes 25 deg* long, and divaricated towards 
the End. 
Next, it is obferved, that though this Star did afterwards flacken its pace, 
yet it retained the vividnefs of its Colour, both of the Head a nd Train •, the 
Uf^efpecially, keeping at tfie time as well of the I aft obfervations as of the 
•' , fir ft: 
