be encV iV ours (chiefly from theOoflrlne of Copernictis^Ke* 
^ler aiid Galileo^ ro explicate the Caufe of the motion of ibe 
Earth about the Sun, of the Moon about the Earth, and 
both about their own Centres* Why the ^quinoflial and 
Solfticial Points, arenot a^waysio the fame point of theE- 
cliptickof the Fixt Stars. Noting, from the fame Authors, 
tUcthe ^<}uinO(aial Points proceed from Weft to Eaft, 
every Hundred years, one Degree or very near ; which is 
36000 years for one whole Revolution. And laftly, why 
the Diftance betwixt che ^quinoftial and theSolftice is not 
always the fame. 
The fifth is, Of the Motions of Water and Air. Wherein 
he fpeaks his fenfe of Tides, and their variations deducing 
them partly from the Motions both of the Earth and Moon ; 
& partly from thefituation of the Sea inrefpeaoftheLanc*. 
Of theGaufeof Clouds,e^^.Of Springs; noting a niiftake 
of Julius Scdiger about a River in Savoy , and thence of the 
Original of Springs. 
The (ixth is, of the Caufes and EfFefts of Heat and Cold : 
Where he fpeaks his opinion of the nature of Fire and Ice. 
The Inflammability of Gun-powder ; of Thunder and Light- 
ning; which, he faith, will not burn> 
The feventh is, of Hard and Soft, and of the Atomes,that 
fly in the Air. Wherein he alfo fpeaks, what he thinks, of 
tfuch Bodies as are generally conceived to be petrified : of 
EIafticicy,and of contagious Airv 
The eighth i?:, of Gravity and Gravitation : Wherein he 
pofitively denies, That Oyl poured upon Quickfilver in a 
bended Siphon (only in at one arm of the Siphon)\vill caufe 
the Quickfilver in that Arm to defcend. He doubts not, 
but that the Sfecies of heavy^hardjopaque and Diaphanous , 
were all made fo at theCreation.Fn the end^explains a Scheme 
0iewing the Degrees of the Inclinatory Needle in pafllng 
from one Pole to another. 
The ninth is, of the Loadftone and its Poles. Where,of the 
Magnetick Attraflion : The Touching of Needles : The Va- 
riarionof theCompafs, and of that Variation*. The reft is 
offer »d,as a Confutation of the Book called Longitude found. 
AflTerting, 
