578 A Geological Idea of Lord Bacon's. [October, 
represented by peninsulas, isthmuses, islands, mountains : 
2*83 2 is the extreme division of land in opposite hemi- 
spheres, and the proportion of the number of vibrations oi 
their respective land masses, as shown by the comparison 
with blades. I exclude details about the difference between 
2*83 and 273. 
The height of a zone occupied by all land past from south 
to north, or in excess at the north, over one-half of all land, 
is 1-2*83 2 of the radius; what connects sphere and blades ? 
South America io° 44' from the antarCtic circle has been 
moved and stretched io° 44' north of the equator ; in the 
extremely tertiary reaction to ii° 35'. The triangle at its 
south reaching to the mouth of the La Plata, opposite the 
southern end of Africa, has been kept in a prototypic position 
by the reflux, its pressure being unimpeded below Africa. The 
northern end of the section has been widened from 31 0 20' 
in the equator to 46° 56', the width of the tropics ; the per- 
turbation in longitude has increased with the increase of the 
polar arc and zone, with the separation and going apart in 
density of sea and envelope. 
The long axis of the section and the bases from West 
Panama to Cape Horn are 66° 32’ as the arc from the polar 
circle to the equator. The east side is 55 0 48', the height 
between the equator and parallel of partition, because the 
triangle is pressed west, the northern side being by reaction 
from the north pressed south at its east, and north at its 
west, from the direction of V. The northern side, West 
Panama to La Roque, is 46° 56'. 
The arc between the two Americas, at the east of the 
deutotype, is 46° 56', the reflux halving the segment. At the 
west polar pressure has reduced the distance to 23° 28'. In 
this interval between the folds a tertiary perturbation has 
produced an island wave. 
Trinidad, Cuba, Yucatan, which io° 44' north of the con- 
tinent repeats its shape and its distance to the equator, 
is connected with the continent by an isthmus, the result of 
the combination of a perturbation in the reflux inclined 
23 0 28' to the equator, with a perturbation in the polar stream 
or line of intensity, V, Pr, L. 
The island wave and isthmus belong to the south section, 
and are, with its land north of the equator, equal to a polar 
section. 
As the sea round Pn gets confined by the motion north of 
the segments, the region round Pn gets depressed, and the 
northern ends of the segments are moved south. Those of 
Ap and Af become truncated ; the water pressing from Pr 
