La vie du président Edwards: . s'adapte à la figure, (Fig. 2.) va inévitablement sortir les particules de theneighbouing, de leurs endroits, qui, peut-être, sont congealedensemble en parcelles raides. Par conséquent, cette rouille doit exiger des vacuités arilyfcause dans une autre direction, en déplaçant ces nouvelles inflexiblecolis d'eau, qui provoquent le déplacement similaire à travers la masse entière, tant que les particules sont contiguës. Représentons toujours la question dans une plus grande figure, pour une illustrateur plus claire. Supposons que le vaisseau A B C D, (Fig. 3.) plein de particules d'eau, dans laquelle

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The life of President Edwards: . asit conforms itself to the figure, (Fig. 2.) will unavoidably thrust out theneighbouiing particles, from their places, which, perhaps, are congealedtogether into stiff parcels. Wherefore, this thrusting must necessarilycause vacuities in another direction, by displacing of these new inflexibleparcels of water, which cause the like displacing through the whole mass, as far as particles are contiguous. Let us still represent the matter in a larger figure, for clearer illustra-tion. Let us suppose the vessel A B C D, (Fig. 3.) full of particles ofwater, into which the particles of cold getting, glue them together, byparcels, of all manner of irregular figures, and magnitudes : but let us sup-pose for the present, that there are seven in a parcel, and that the parcelsbe those which we have marked out by the crooked lines, connecting them.It is all one, as to the room they take up, let them be taken in any otherfigure whatever. It is evident that they will be drawn into this form, Fig. 3.. ^. ^t^*?^^* ^^^y cannot lie in such a form, without far oreater vacu-ities than before, and that, when they are brought in this form, the sur-A R n n ^^A^l ^^ ^^ considerably lifted above the brim of the v&sel, A JJ ly L», and the water wUl take up much more room than before, let NOTES ON NATURAL SCIENCE. 753 Uiem lie as close as tlieir figures will allow of. These vacuities will begreater or less, ceteris parous, according as the parcels congealed, aregreater or less. Now it is very evident, from the foregoing principles, that many of theseparcels may be drawn into one, and often will, as we see many bubblestipon the surface of water, run into one. For instance, the gluing parti-cles that hold together the parcel O, (Fig 4.) may iiapp.^n to catch hold oftiie parcel G, or F, and thereby they will be drawn into one. This willbe, especially upon an increase of cold, or the incursion of a great plentyof these particles; for whereas there were then no more

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