tsfTreMifccf BODIES. Chap.n 



for we fee tint a ballone fluffed hard with aire is heavier then 

 an empty one. Again move water would not be heavier then 

 Idle if the inward parts of it did not weigh : and if a hole were 

 digged in the botrome of the fca, the water would not run into 

 it and fill it, if it did not gravitate over ir. Laftly>thcre are thofc 

 vvho undertake to diftinguifl) in a deep water., the divers weights 

 which fcverall parts of it have , as they grow ftill heavier 

 and heavier towards the bottome : and they arc fo cunning in 

 tkis art, that they profeffc to make mftrumcnts which by their 

 equality of their weight to a determinate part of the water, fhall 

 ftand juft in that parts and neither rife nor fall higher or lower: 

 but if it be put lower, it fhall afcend to its cxacl equally weigh- 

 ing orbc of the water ; and if it be put higher, it fhall defend 

 untill it cometh to reft precifcly in that place. Whence it is evi- 

 dent, that parts of water do weigh within the bulk of their 

 main body ; and of the like we have no reafon to doubt, in the 

 other two weighty Elements. 



As for the oppofition of the fyphon, we referrc that point to 

 where we fhall have occafion to declare the nature of that 

 engine, of fet purpofc. And there we fhall fhew, that it could 

 not fucceed in its operation ,unleflc the parts of water did gravi- 

 tate in their main bulk>into which one kg of the fyphon is funk. 

 * LafUy> it may be objected, that if there were ftich a courfe of 

 atomes as we fay;and that their ftrokcs were the caisfc offo no- 

 fwcrcd: and taD i e an erTeft, as the gravity of heavy bodies: we fhould feel ic 



the reafon why i t t j- L-L* A i 



we do not ftci palpably in our own bodies, which experience Ihewetn us we 







that To this we anfwer firft , that their is no neeefTity xve fhould 

 &^ tnis courfe of atomes, fmcc by their fubtiky they penetrate 

 all bodiesjand confcquemly>do not give fuch ftrokes as are fen- 

 fible. Secondly, if we confidcr that dufts, and ftrawes, and fea- 

 thers do light upon us without caufing any fenfc in us* much 

 more we may conceive that atomes (which are infinitely more 

 fubtile and Irght jcannot caufe in us any feeling of them. Third- 

 ly, we fee that what is continuall with us, and mingled in all 

 things doth not make us take any efpcciall notice of it and this 

 is the cafe of the fmiting of atomes. Nevcrtheleffe, peradventurc 

 we feel them in truth, as often as we feel hot and cold weather, 

 and in all eatarrcs or other fuch changes, which do as k were 



fink. 



