NOW _this_ does not only happen to _Four-footed Beasts_, and all that possess the dry _LAND_; but also more especially to the _Inhabitants_ of the _SEA_: And how remarkable is it, that the very _Shell-Fish_, (how closely soever shut up, and how low soever buried, as it were, in the very _ABYSS_ of the _Deeps_) cannot be exempted from the sensible Impression of this LUNAR _Power_? To this Point and Purpose (I think) _Lucilius_[136], that Learned Poet, manifestly alludes, saying, _“Luna alit Ostrea, & implet Echinos, Muribus “Fibras & Pecui addit._ And after _Him_, _Manilius_[137], that great _Astronomer_, writes _à propos_ upon this _Topick_, when he says, _“Sic submersa fretis Concharum & Carcere clausa “Ad Lunæ motum variant Animalia Corpus._ THESE Things then being evidently so, and it being a most certain and undeniable _Truth_, that the SUN and MOON have each their respective _Influence_ upon all _Inferiour Bodys_: (as has also been already shewn in _Sect._ I. _Chap._ 8.) I come now to observe that such _Mutations_ as are _Quick_ and _Brief_, or such _Changes_ as are accomplished in a _Few Days_, may be entirely ascribed to the _Power_ of the MOON: As in the _Reverse_ of these _Cases_, which cannot be determin’d under a _Long Time_; the _Course_ of the SUN is more chiefly to be consider’d and principally regarded. SO _Acute Fevers_ (because _SHORT_) are generally assuaged and dissolved in _14 Days_: Whereas _Quartans_ (because _LONG_) on the contrary are only determin’d in _six Months_. It’s true indeed, the _Antients_ ascribed these _Laws_ of NATURE, to _Pythagorean Numbers_, and distinguish’d the _Times_ of FEVERS according to their _Critical Days_, which they strictly animadverted, as they laid great _Stress_ upon that Ceremonious Observation. HOWEVER, _Galen_ made a far stricter _Disquisition_ in this Matter, and conceiv’d (as the _Truth_ indeed is) that the _Accessions_ and _Crises_ of FEVERS had no _Connexion_ with any _NUMBERS_ or _odd Days_, but took _Origin_ only from the _Efficacy_ of the MOON: (as is more fully explain’d in _Chap._ 28. of this _Section_.) According to which _MAXIM_[138], _Acute Distempers_ have their _Circulations_ in _Seven Days_, and take their _Accesses_ and _Declinations_ from the _Course_ of the MOON; which every _Seventh Day_, when NEW, HALF-FULL, or FULL, has her greatest _Influence_.