Obfervationsof Mr. Hos^m^dQ inPehmry ^\ii Marchh% 
and by him communicated to the Jl{pyal Society , and fince 
T?finted in thQTran/aSiions,pnb\i{litd Jpr. r, 1666. co.nfonaiit 
to the like obftrvations of ftipker j midd by \}^^ M^y- K^^4s 
and fince comtnniiicated to th^iatnt Society' , and then pub- 
tiflied in the TranfaSims , of March. 6. then next follow- 
ing. Kow that the Ekf th hath fuch a ihotidn about its own 
Axis ( whereby It mfght be frttcd to carry about the Moon ) 
is eviddnt by its^?»rw^/ motion. And it (eems as evfdent that 
the Moon hath not ; becaufe of the fam ^ fide of the Moon al- 
Waies turned towards us ; which dpuld not be , if the Moon 
carried the Earth about : tJnleffe we fliould fay, that it Carries 
about the Earth in juft the fame Period, in whichitturnes op- 
b^h its own Axis: , Which is'c6ntrary to that of the Sun carry- 
'ing aboiitthe Planets: the fhorteft of whofe Periods 3 is yet 
longer than that of the Suns moving about its own Axis, And 
the like of Jupiter^ fliorter than the Pcribd of any of his Satelli* 
tes ; if at Ieaft,the Period of his converfion about his Axis, late- 
ly faid to be obferved^ prove true. ( Of Saturn we have not 
yet any Period affigned ; but it's likely to be Ihoi-ter, than that 
of his Satelles, ) And therefore we have reafon to believe, 
notthatby the Moons motion about its Axis the Earth fliould 
be carried by a contemporary Period ( whereby the fame face 
of the Moon fliould b*? ever towards us • ) but that by the Earths 
revolution abouts its Axis in 24: hours^ the Moon fliould be 
carried about it in about 29. dayes, without any motion on its 
own Axis: And accordingly, that the tS'^'^^Tjfi'i^ry Planets about 
J^uptter and Saturn^ are not ( like their 'Priiicip^ls ) turned a- 
^Doiit their own A^ls. ; And therefore I am not at^all incHned 
"tobelieve, Jthit thcf Mettfirml Period of the Tides with us, is to 
^beialved b^uch an Hypothefis. ' 
In Itead of this^ that Surmife of mine , ( for T dare not yet, 
f,!^^ith.cWfid9^^^^^ it any better narae^ ) of what ihave fpok- 
cn to y6a heretofbrej ( and which hath occafioned tTiis pfe?- 
*fen?acc6inVt which I am how ^iviil^you," J,is to this- piirpbfei. 
* ■ The Earth and Moon being kndwn to be Bodies of fo gre^t 
'connexion ( whether by any Magnetick,, or what other Ty^, 
"^T willlxotdbtermiWe' ; ' not need I, as to this piirpofci ) a^^^th^t 
Y'-^ -^-"^-^ O o the 
