Lastly, to that which we read in the latter part of the Text[97], that is to say, that we must compare the Gravity of the Moveable with the Resistance of the Medium against Division, because if the force of the Gravity exceed the Resistance of the _Medium_, the Moveable will descend, if not it will float. I need not make any other answer, but that which hath been already delivered; namely, that its not the Resistance of absolute Division, (which neither is in Water nor Air) but the Gravity of the _Medium_ that must be compared with the Gravity of the Moveables; and if that of the _Medium_ be greater, the Moveable shall not descend, nor so much as make a totall Submersion, but a partiall only; because in the place which it would occupy in the water, there must not remain a Body that weighs less than a like quantity of water: but if the Moveable be more grave, it shall descend to the bottom, and possess a place where it is more conformable for it to remain, than another Body that is less grave. And this is the only true proper and absolute Cause of Natation and Submersion, so that nothing else hath part therein: and the Board of the Adversaries swimmeth, when it is conjoyned with as much Air, as, together with it, doth form a Body less grave than so much water as would fill the place that the said Compound occupyes in the water; but when they shall demit the simple Ebony into the water, according to the Tenour of our Question, it shall alwayes go to the bottom, though it were as thin as a Paper. [97] Lib. 4. c. 6. Text 45. [Decoration] FINIS. [Decoration] * * * * * [Detailed Transcriber's Notes The text has been made to match the original text as much as possible including variation in spelling, punctuation, italics etc. The following, details apparent printer's errors as well as changes or additions to aid readability of text. Page 1, missing full stop after abbreviation gr. '0 gr 54 min.'. Page 3, sidenote, missing space between words 'the Authority ofan Author.'. Page 3, printer's error, augmentarion for augmentation 'and augmentarion of Masse'. Page 4, missing letter t 'tha{t} that proceeded not'. Page 4, printer's error or inconsistent punctuation, 'my paynes and time. and although'. Page 6, inconsistent punctuation, full stop after axiome where as there are none after those following 'AXIOME. I.'. Page 9, missing full stop added to end of paragraph 'or else an upright Prisme.'. Page 11, printer's error, missing letter C in illustration, 'the Prisme A C D B to be placed'. Page 15, printer's error or archaic lettering, final y looking like a 7 in original text'and of the Specifick Gravit{y}'. Page 16, printer's error, letter N for T in text to refer to illustration, 'if the Vessell E N S F'. Page 16, printer's error, duplicate word in text 'equalizeth the Force and and Moment,'.