Mrcoroorarnia, 31 
even higher thenthe a ws able by-its.bare. pdt toraifeit :;.For, 
Congruity isa principle that not only unites and holds a body-joyned to, 
it, but, wud: ismore, attracts.and draws body,that is SM 
holds it above itsufual height) =. . aR 5 bak Se 
And this is obvionseven ina drop of water fufpended under. any, Six 
milar or Congruous body: : For,befides the ambient preflure that helps to, 
keep it fufteind, there isthe Congruity of the bodies that are contigu: 
ous. This is yet more evident in Tenacious andGlutinous bodies, fuck 
as Gummous Liquors, Syrups, Pitch, and Rofin melted; Gc. Tar, Turs - 
pentine, Balfom, Bird-lime, cc. for there it is evident , that the Parts 
of the tenacious body, as I may fo call it, doftick and adhere {0 clofe- 
ly together, that though drawn out into long and very flenderCylins 
ders, yet they will not eafily relinguifh one anothers and this, though 
the bodies be aliquatexus fluid, andinmotion by one another; which 
to fuch as confider a fluid body only asits parts are in a confufed. irregu- 
lar motion, without taking in alfo the congruity of the parts one among, 
another, and incongruity to. fome other bodies, does appear not, alittle 
ftrange. So that befides the incongruity of the ambient fluid to it, we 
are to confider alfo the congruity of the parts of the contein‘d fluid one 
with another. : rid Hate 
- And this Congruity (that I may here a little further explain it) is both 
a Tenaceous an Attractive power for the Congruity, in the Vi+ 
brative motions,may bethe caufe of all kind of attraction, not only Ele+ 
étrical, but Magnetical alfo, and therefore it may be alfo of Tenacity 
e and Glutinoufnefs. For, ftom a perfect congruity of the motions of two 
diftant bodies, the intermediate fluid particles are feparated and dro- 
ven away from between them, and thereby thofe ooy en bodies are, 
by the incompafling mediums, comipell’d and forced neerer together 5 
wherefore that attractivenefs muft needs be ftronger, when, by anim- 
mediate contatt, they are forc’d to be exactly the fame: As I fhew more 
at large in my Theory of the AZagnet. And this hints toe me the reafon of 
the of the Afercury many inches, nay many feet, aboye the ufu- 
al {tation of 30 inches. For the parts of Quick-filver, being {0 very 
fimilar and congruous to each other, if once united, will not eafily faffer 
adivulfion: And the parts of water, that were any wayes heterogeneous, 
being by exantlation or rarefaction exhaufted, the remaining parts bei 
alfo very fimilar, will not eafily part neither. And the parts of the Glag 
being folid, are more difficultly disjoyn'd ; and the water, being fome- 
what fimilar to both, is, as it were, a medium to unite both the Glef and 
the Mercury together, $0 that allthreebeing united, and notyery dif 
fimilar, by means of this contac, if carebe taken that the Tube ine- 
recting be not thogged, the Quicksilver will remain fafpended, notwith- 
ftanding its contrary indeavour of Gravity, a greatheight above its or- 
dinary Station; butif this immediate Contatt :be'removed , ,eitherby a 
meer feparation of them one from another by:the force of a fhog, where- 
by the other becomes imbodied: between them, and licks mp from 4 
furface fome agil parts, and fo hurling them makes them air 5 or a 
-f 
