i88i.l A Geological Idea of Lord Bacon's, 531 
will be folded in latitude. The break will be driven from 
that hemisphere where gravity and the mass of the sea are 
greatest towards the other ; from round Ps, where gravity 
on the earth is greatest, and the sea is deepest towards Pn. 
The interval between folds will be moved from the equator 
towards the north. 
Globe III. thus shows that the segment Pr has been di- 
vided into two equal halves by the reflux of the sea. These 
halves are connected by an isthmus. Isthmuses, islands, 
peninsulas, certain regions, are the results of conflicting 
proportions ; two or more contradictory conditions must be 
compromised ; interference waves, supplements, are the 
consequence. 
If a mass of liquid, equal in extent, depth, and density in 
the respectively equal parallels, moved in retrogression and 
progression, parallel with an equator coinciding with the 
orbit, striking the solid according to the apsides of the 
parallels first in the pericentric meridian Pr, the forming 
folds would coincide with the meridian. But when the sums 
of striking forces become unequal to the sides of the equator 
the fold must become inclined to meridian Pr, which itself 
will not be exempt from motion over the nucleus reading by 
elasticity. 
The inequality of forces moving the fold to the incline is 
represented by two equal forces aCting in opposite senses, 
gradually moved from the points Ps and Pn towards Pr, 
and by the plus of force consequent on the greater conden- 
sation, and consequently greater mass of liquid in one hemi- 
sphere, which causes this liquid, having a depth beyond the 
mean one, to press, move, and fold from Ps towards Pn, 
causing an increasing reaction of folding from Pr back to- 
wards Ps. 
The varying differences between the equal forces and the 
plus determine the quantities and senses of absolute sliding 
of the envelope V, and its single strata over the nucleus. 
It is the inequality of masses and distribution of forces in 
any pair of hemispheres, and the difference of inner attrac- 
tion of solid and liquid envelope, that is of elasticity, which 
determines the size of folds and their subdivision, and opens 
the passage for a complete circulation of the sea. 
The polar zones contain land to sea 1 : 2*83 ; the tropical 
zones contain — 
— — + — + — 1 = - 
2978 287 3546 27 
of all land less than 1 of land to 2*83 of sea ; the middle 
zones so much more. 
