] -- Tr.
[footnote] ** In a plan of the neighborhood of Tezcuco, Totonilco, and
Moran ('Atlas Geographique et Physique', pl. vii.), which I originally
(1803) intended for a work which I never published, entitled 'Pasigrafia
Geognostica destinada al uso de los Jovenes del Colegio de Mineria de
Mexico', I names (in 1832) the Plutonic and volcanic eruptive rocks
'endogenous' (generated in the interior), and the sedimentary and flotz
rocks 'exogenous' (or generated externally on the surface of the earth).
Pasiward, [upward arrow] and the latter by the same symbol directed downward
[downward arrow]. These signs have at least some advantage over the
ascending lines, which in the older systems represent arbitrarily and
ungracefully the horizontally ranged sedimentary strata, and their
penetration through masses of basalt, porphyry, and syenite. The names
proposed in the pasigraphico-geognostic plan were borrowed from De
Candolle's nomenclature, in which 'endogenous' is synonymous with
monocotyledonous, and 'exogenous' with dicotyledonous plants. Mohl's more
accurate examination of vegetable tissues has, however, shown that the
growth of monocotyledons from within, and dicotyledons from without, is not
strictly and generally true for vegetable organisms (Link, 'Elementa
Philosophiae Botanicae', t.
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