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38.

It is for ye same reason that two wet balls joyn together and that they approach ye sides of ye glass when it is not full: for there is made a like elevation of ye water, and when it is full and that ye water passeth heigher than ye sides ye wet ball is joyned back after ye same manner as by a ball not wet; for approaching ye side of ye glass C, ye small elevation of ye water A B, elevates that wch is between B and C, and then all the elevation is more than that along D F wch is but concave and by consequence ye cork shall be pushed back from the side to D, wch is conformable to experience.

[[Image: drawing of a dotted line D B and crooked line F A B C.  The segment F A B arches over a circle (ball) at the edge of the glass C.]]

The difficulty that water has to joyn to wax, causes that sometimes bodys heavier than water, do not run to ye bottom as if the small cylinder E K is of box or of [[striketrough]][[?]][[/strikethrough]] some other wood heavier than water and that it is rubbed over with tallow or vernished to hinder the water from sticking to it, it will remain suspended and sink into the water as F G H K I L M; for ye space of the air G F L M, wch is below the levell A F M B having no weight, the bottom O P shall not be more changed than C O wch is equal to it, and also we may push a little lower ye small cylinder with one finger, withouts its going to ye bottom; provided that ye curves F G, M L may be less than one line and a half, for they may be two lines without making the ye run upon G L, it will have more air on ye top, and as soon as we shall take away the finger, ye cylinder will remount, not because the air withdraws from it, but because the side colums of water whose bases are equall to P O, weigh more and make the cylinder G L to mount. One may put for ye same reasons a small eguille upon the water when it is calm without sincking, if it is a little slippy and dry; but as soon as it shall be wet, ye water will stick to it, and it will sink to ye bottom.

[[Image: drawing ov a vessel outlined A C D B with a horizontal liquid level A F M B, showing an object E barely floating on the surface slightly below the liquid level. The liquid level dips down from the surface G H to the object's bottom K and back up to the surface I L.  There are two vertical lines drawn down from the corners of E intersecting the bottom of the vessel at G

One may be surprised that Ice swims on ye top of ye water, for it seems that being colder than runing water it should be more condensed and by consequence heavier. But we must observe that ye ice is always mixed with some bubles of air, as hath been explained in ye former part; and it is that mixture wch renders it lighter; and also that in some places of ye ice; that mixture is not visible because of the smallness of ye parcells of ye air; we may believe that there is always a little, and that little joyned to ye ice whose condensation in regard of ye water is not very considerable, may make a compositum less heavy than ye water:

The same thing happens to lead, to grease, wax, and to some other such matters; for these matters being melted sustain those parts which are not yet melted, which proceeds from hence that there is allways made some void intervalls between ye parts of these bodys when they begin to harden. If we break a ball of lead in ye middle we shall find towards ye center a considerable void place; grease in its congealing becomes opaque because of ye small void intervals wch are there made, which hinders ye light to continue in a straight line by ye divers refractions and reflections which it suffers.

Transcription Notes:
Reviewed mandc re-reviewed: Upper case D looks like a lower case cursive "b." Changed some letters (B to D, J to I, etc.) Added more detailed image description.