GEOLOGICAL TIME.—PROBABLE DATE OF THE GLACIAL EPOCH.
Geological Time measurable from Astronomical Data.—M. Leverrier’s
Formulæ.—Tables of Eccentricity for 3,000,000 Years in the
Past and 1,000,000 Years in the Future.—How the Tables have
been computed.—Why the Glacial Epoch is more recent than had
been supposed.—Figures convey a very inadequate Conception
of immense Duration.—Mode of representing a Million of
Years.—Probable Date of the Glacial Epoch 311