. The philosophical works of the Honourable Robert Boyle esq.: abridged, methodized, and disposed under the general heads of physics, statics, pneumatics, natural history, chymistry, and medicine. its ft ate j a7id fuppofmg fluidsf, whilft C07ifi7idt and Q 0 2 at Preface. ^ re ft J wholly unable to ati upon hodics ; no reafon appears tothem, why they Jhouldj as it were, take away a part of thegravity oj the bodies immerfed i7t thein; and, jnuch lefs, whythey (hould, fometiines, throw them upwards with a greatforce* Ihis was remarkably the cafe with that great fcholar,2)r. More; whot tofohefuch
. The philosophical works of the Honourable Robert Boyle esq.: abridged, methodized, and disposed under the general heads of physics, statics, pneumatics, natural history, chymistry, and medicine. its ft ate j a7id fuppofmg fluidsf, whilft C07ifi7idt and Q 0 2 at Preface. ^ re ft J wholly unable to ati upon hodics ; no reafon appears tothem, why they Jhouldj as it were, take away a part of thegravity oj the bodies immerfed i7t thein; and, jnuch lefs, whythey (hould, fometiines, throw them upwards with a greatforce* Ihis was remarkably the cafe with that great fcholar,2)r. More; whot tofohefuch an appearance, wouldfai7i haveintroduced a new, and a7i immaterial principle into phyfics^And this gave birth to another of the enfuing pieces; which^tho^ it alfo relates to fotne experiments, that appear underthe head of pneumatics, we thought jit to range intire, underthis of Jiatics ; becaufe^ in JiriBnefs, tis wholly hydrojia-tical; taking that term in its larger fenfe , becaufe wewould not break in upon the order of the pneumatical pieces \and, lafily, becaufe hydrofiatics oughts always, to precede pneu*matics; fince the latter cannot be underjiood without a know*ledge of the former-. Hydro- ( i85) Hydroftatical Paradoxes, Proved and Illuftrated by EXPE RIMENTS. POSTULATA, & LEMMATA. I. C lUppofe a tube, open at both ends, held, with one of them, per- ^^ pendicularly, under water ; the lower orifice may be conceiv d to. V^J terminate in a plain parallel to the horizon, or the upper the fluid. 2. AH affignable equal portions of this furface, will be equally the water perpendicularly incumbent thereon. For the fluid being here luppofed homogeneous, as to its gravity, andto ftand, at the fame height, upon all the parts of the imaginary plain ; part can poiTibly be more prefled than another, in the fame fur-face. g. If any part of this imaginary plain, bepreffed with a greater weight,than another, the former will be either difplaced, or deprefle
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