dim Metaphyfmm againft Ibme ExpHcadoc^ of New Experl- 
meots, made by our Author, and relating to the Oravitatioo 
and PrcflTure of Fluids. Our Noble Phibfopher thad M his 
Vindication ftillaflcrts, and with great clearoefs maiatai'os j 
Thatj fuppoGng the World to have been at iirft made and to 
be continually preferv'd by Gods divine power and wifdom^ 
andfuppofiog his general concourle to themaiotenance of the 
Laws by him eftablilh't in it j the Vh<en(mena, he endeavours 
to explicate, may befolv'd Mechanically^ that is, by the Me* 
cbanical atfeftions of Matter, without introducing any preca^ 
rbus Principksj fuch as he cfteems to be N^/«re'/ Abhorrence 
of a Vacuum^ SuhJianHal Forms ^ot Dr. Mores HyUrchical Prirn^ 
ciple^ i.e. (in plainer termSj) h\s created Immaterial DireBor. 
But in thisExplication^our Author^ to make his D^fcourfcthe 
more Inftruftive, occafionally adds fcveral Confidei^ations and 
Experiments, for the clearing up and confirming fothe HjdrO' 
Jiattcal Tvmhsy that he fears are but by very few aflented to, 
or perhaps fo much as uoderftood. Amongft them, he diP 
cuflcs at large and folves this noble Problem, Whence itis^ that 
Urioators or Divers are fo far from being killed or oppreffid by 
the Weight of the incumbent and ambient water, that thej are no% 
fo much as hurt by it. Goncerniag which he takes notice^that 
in this Queftion 'tis taken fur granted, that D^z^^r/ 5 though 
at never lo great a depth, feel no prcfTure againft them by the 
water 5 which he fai^h is an affirmatiou in point of fafl:,of whofe 
truth he makes fome qucftion, alledging the reafon why he 
doth fo. 
Tothis Hydro/iati&al Dijcourfi OUT Author fubjoins a It?^/^, 
dilucidating an Experiment of his about a way of Weighing wa-- 
ter in water ^ upon the occafion of fome Exceptions made to ic 
by Mr. George Sinclair in hhHydr(fiatic^f lately printed dX Edim 
burg. 
Upon which occafion thePubliflier of thefe Papers finds 
himfclf obliged to take notice of a Pamphlet annext at the end 
of this fame Book of Mv.Sinclairs^ called, A Vindication of the 
Preface of the Bool^intitul'd^ Georgii Sinclari.c^^. Ars nova & 
magna Gravitatk Levitatkfrom the challenges and reflexions 
ofthePubUjh^r of the PhiL tranfa^QHS^ as they are to be found in 
^umb, '^o.AHgA6^66g. B b b b b b Not 
