so as to make them fluid) those cohering particles may vibrate in the same manner almost as those that are loose and become unisons or discords, as I may so speak, to them.  Now that the parts of all bodies, though never so solid, do yet vibrate, I think we need go no further for proof, then that all bodies have some degrees of heat in them, and that there has not been yet found any thing perfectly cold:  Nor can I believe indeed that there is any such thing in Nature, as a body whose particles are at rest, or lazy and unactive in the great Theatre of the World, it being quite contrary to the grand Oeconomy of the Universe.  We see therefore what is the reason of the sympathy or uniting of some bodies together, and of the antipathy or flight of others from each other:  For Congruity seems nothing else but a Sympathy, and Incongruity an Antipathy of bodies, hence similar bodies once united will not easily part, and dissimilar bodies once disjoyn’d will not easily unite again; from hence may be very easily deduc’d the reason of the suspension of water and Quick-silver above their usual station, as I shall more at large anon shew.

These properties therefore (alwayes the concomitants of fluid bodies) produce these following visible Effects: 

First, They unite the parts of a fluid to its similar Solid, or keep them separate from its dissimilar.  Hence Quick-silver will (as we noted before) stick to Gold, Silver, Tin, Lead, &c. and unite with them:  but roul off from Wood, Stone, Glass, &c. if never so little scituated out of its horizontal level; and water that will wet salt and dissolve it, will slip off from Tallow, or the like, without at all adhering; as it may likewise be observed to do upon a dusty superficies.  And next they cause the parts of homogeneal fluid bodies readily to adhere together and mix, and of heterogeneal, to be exceeding averse thereunto.  Hence we find, that two small drops of water, on any superficies they can roul on, will, if they chance to touch each other, readily unite and mix into one 3d drop:  The like may be observed with two small Bowls of Quick-silver upon a Table or Glass, provided their surfaces be not dusty; and with two drops of Oyl upon fair water, _&c_.  And further, water put unto wine, salt water, vinegar, spirit of wine, or the like, does immediately (especially if they be shaken together) disperse it self all over them.